{
  "title": "Triangle Basics - Sides, Vertices, Angles - Grade 7 CBSE",
  "total_questions": 150,
  "questions": [
    {"id": 1, "difficulty": "easy", "question": "How many sides does a triangle have?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 2, "difficulty": "easy", "question": "How many vertices in a triangle?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "B"},
    {"id": 3, "difficulty": "easy", "question": "Sum of angles in triangle = ?", "options": {"A": "90°", "B": "180°", "C": "270°", "D": "360°"}, "correct_answer": "B"},
    {"id": 4, "difficulty": "easy", "question": "Triangle with all sides equal is:", "options": {"A": "Isosceles", "B": "Scalene", "C": "Equilateral", "D": "Right"}, "correct_answer": "C"},
    {"id": 5, "difficulty": "easy", "question": "Triangle with two equal sides is:", "options": {"A": "Equilateral", "B": "Isosceles", "C": "Scalene", "D": "Right"}, "correct_answer": "B"},
    {"id": 6, "difficulty": "easy", "question": "Triangle with all sides different is:", "options": {"A": "Equilateral", "B": "Isosceles", "C": "Scalene", "D": "Right"}, "correct_answer": "C"},
    {"id": 7, "difficulty": "easy", "question": "Triangle with one 90° angle is:", "options": {"A": "Acute", "B": "Obtuse", "C": "Right", "D": "Equilateral"}, "correct_answer": "C"},
    {"id": 8, "difficulty": "easy", "question": "In equilateral triangle, each angle = ?", "options": {"A": "45°", "B": "60°", "C": "90°", "D": "120°"}, "correct_answer": "B"},
    {"id": 9, "difficulty": "easy", "question": "In right triangle, other two angles are:", "options": {"A": "Both 45°", "B": "Complementary", "C": "Supplementary", "D": "Equal"}, "correct_answer": "B"},
    {"id": 10, "difficulty": "easy", "question": "Triangle with all angles < 90° is:", "options": {"A": "Acute", "B": "Obtuse", "C": "Right", "D": "Equilateral"}, "correct_answer": "A"},
    {"id": 11, "difficulty": "easy", "question": "Triangle with one angle > 90° is:", "options": {"A": "Acute", "B": "Obtuse", "C": "Right", "D": "Equilateral"}, "correct_answer": "B"},
    {"id": 12, "difficulty": "easy", "question": "In isosceles triangle, base angles are:", "options": {"A": "Equal", "B": "Different", "C": "Right", "D": "Obtuse"}, "correct_answer": "A"},
    {"id": 13, "difficulty": "easy", "question": "Perimeter of triangle = ?", "options": {"A": "Sum of sides", "B": "Product of sides", "C": "Sum of angles", "D": "Base × height"}, "correct_answer": "A"},
    {"id": 14, "difficulty": "easy", "question": "Area of triangle = ?", "options": {"A": "½ × base × height", "B": "base × height", "C": "½ × sum of sides", "D": "side²"}, "correct_answer": "A"},
    {"id": 15, "difficulty": "easy", "question": "In right triangle, side opposite right angle is:", "options": {"A": "Altitude", "B": "Hypotenuse", "C": "Base", "D": "Leg"}, "correct_answer": "B"},
    {"id": 16, "difficulty": "easy", "question": "Two sides of triangle are 3 cm and 4 cm. Third side must be:", "options": {"A": "Greater than 7 cm", "B": "Less than 7 cm but greater than 1 cm", "C": "Exactly 5 cm", "D": "Less than 1 cm"}, "correct_answer": "B"},
    {"id": 17, "difficulty": "easy", "question": "If two angles are 60° and 70°, third angle = ?", "options": {"A": "40°", "B": "50°", "C": "60°", "D": "70°"}, "correct_answer": "B"},
    {"id": 18, "difficulty": "easy", "question": "Angles of triangle are in ratio 1:2:3. Largest angle = ?", "options": {"A": "30°", "B": "60°", "C": "90°", "D": "120°"}, "correct_answer": "C"},
    {"id": 19, "difficulty": "easy", "question": "In right isosceles triangle, acute angles = ?", "options": {"A": "30° each", "B": "45° each", "C": "60° each", "D": "90° each"}, "correct_answer": "B"},
    {"id": 20, "difficulty": "easy", "question": "Triangle inequality states: sum of any two sides > ______ side.", "options": {"A": "First", "B": "Second", "C": "Third", "D": "Any"}, "correct_answer": "C"},
    {"id": 21, "difficulty": "medium", "question": "Sides of triangle are 7 cm, 10 cm, 15 cm. Is it possible?", "options": {"A": "Yes", "B": "No", "C": "Only if right", "D": "Only if obtuse"}, "correct_answer": "A"},
    {"id": 22, "difficulty": "medium", "question": "In ΔABC, ∠A=55°, ∠B=65°. Find ∠C.", "options": {"A": "50°", "B": "55°", "C": "60°", "D": "65°"}, "correct_answer": "C"},
    {"id": 23, "difficulty": "medium", "question": "If angles are (2x+10)°, (3x-20)°, (x+30)°, find x.", "options": {"A": "20", "B": "25", "C": "30", "D": "35"}, "correct_answer": "B"},
    {"id": 24, "difficulty": "medium", "question": "In isosceles triangle, vertex angle=40°. Find base angles.", "options": {"A": "60° each", "B": "65° each", "C": "70° each", "D": "75° each"}, "correct_answer": "C"},
    {"id": 25, "difficulty": "medium", "question": "Sides are 5 cm, 12 cm, 13 cm. Type of triangle?", "options": {"A": "Acute", "B": "Obtuse", "C": "Right", "D": "Equilateral"}, "correct_answer": "C"},
    {"id": 26, "difficulty": "medium", "question": "If one angle of isosceles triangle is 100°, find other angles.", "options": {"A": "40°, 40°", "B": "50°, 30°", "C": "60°, 20°", "D": "80°, 0°"}, "correct_answer": "A"},
    {"id": 27, "difficulty": "medium", "question": "Angles are in ratio 2:3:4. Find smallest angle.", "options": {"A": "30°", "B": "40°", "C": "50°", "D": "60°"}, "correct_answer": "B"},
    {"id": 28, "difficulty": "medium", "question": "In right triangle, one acute angle=35°. Find other.", "options": {"A": "45°", "B": "55°", "C": "65°", "D": "75°"}, "correct_answer": "B"},
    {"id": 29, "difficulty": "medium", "question": "Perimeter of equilateral triangle=24 cm. Find side.", "options": {"A": "6 cm", "B": "8 cm", "C": "10 cm", "D": "12 cm"}, "correct_answer": "B"},
    {"id": 30, "difficulty": "medium", "question": "In ΔPQR, ∠P=80°, ∠Q=50°. Longest side is opposite:", "options": {"A": "∠P", "B": "∠Q", "C": "∠R", "D": "Cannot determine"}, "correct_answer": "A"},
    {"id": 31, "difficulty": "medium", "question": "Area of triangle with base=12 cm, height=5 cm = ?", "options": {"A": "30 cm²", "B": "40 cm²", "C": "50 cm²", "D": "60 cm²"}, "correct_answer": "A"},
    {"id": 32, "difficulty": "medium", "question": "If two sides are 8 cm and 15 cm, third side can be:", "options": {"A": "5 cm", "B": "7 cm", "C": "23 cm", "D": "25 cm"}, "correct_answer": "B"},
    {"id": 33, "difficulty": "medium", "question": "In scalene triangle, all angles are:", "options": {"A": "Equal", "B": "Different", "C": "Right", "D": "Obtuse"}, "correct_answer": "B"},
    {"id": 34, "difficulty": "medium", "question": "Exterior angle = sum of:", "options": {"A": "All interior angles", "B": "Two interior opposite angles", "C": "Adjacent interior angle", "D": "Exterior angles"}, "correct_answer": "B"},
    {"id": 35, "difficulty": "medium", "question": "If one angle=60°, second=80°, triangle is:", "options": {"A": "Acute", "B": "Obtuse", "C": "Right", "D": "Cannot determine"}, "correct_answer": "A"},
    {"id": 36, "difficulty": "medium", "question": "In ΔABC, AB=AC and ∠A=100°. Find ∠B.", "options": {"A": "30°", "B": "40°", "C": "50°", "D": "60°"}, "correct_answer": "B"},
    {"id": 37, "difficulty": "medium", "question": "Sides 6 cm, 8 cm, 10 cm form which triangle?", "options": {"A": "Acute", "B": "Right", "C": "Obtuse", "D": "Equilateral"}, "correct_answer": "B"},
    {"id": 38, "difficulty": "medium", "question": "If perimeter=30 cm and two sides are 10 cm, 12 cm, third side=?", "options": {"A": "5 cm", "B": "6 cm", "C": "7 cm", "D": "8 cm"}, "correct_answer": "D"},
   {"id": 39, "difficulty": "medium", "question": "In right triangle, hypotenuse=13 cm, one leg=5 cm. Find other leg.", "options": {"A": "8 cm", "B": "10 cm", "C": "12 cm", "D": "15 cm"}, "correct_answer": "C"}
, {"id": 40, "difficulty": "medium", "question": "Angles (x+20)°, (2x+10)°, (3x-30)° sum to 180°. Find x.", "options": {"A": "20", "B": "25", "C": "30", "D": "35"}, "correct_answer": "C"},
    {"id": 41, "difficulty": "medium", "question": "Isosceles triangle has equal sides 13 cm, base=10 cm. Find area.", "options": {"A": "50 cm²", "B": "60 cm²", "C": "65 cm²", "D": "70 cm²"}, "correct_answer": "B"},
    {"id": 42, "difficulty": "medium", "question": "In obtuse triangle, obtuse angle is:", "options": {"A": ">90°", "B": "<90°", "C": "=90°", "D": "=180°"}, "correct_answer": "A"},
    {"id": 43, "difficulty": "medium", "question": "Triangle with sides 4 cm, 5 cm, 6 cm is:", "options": {"A": "Acute", "B": "Right", "C": "Obtuse", "D": "Equilateral"}, "correct_answer": "A"},
    {"id": 44, "difficulty": "medium", "question": "If two angles of triangle are 45° and 55°, third angle is:", "options": {"A": "80°", "B": "85°", "C": "90°", "D": "95°"}, "correct_answer": "A"},
    {"id": 45, "difficulty": "medium", "question": "In equilateral triangle, altitude=7√3 cm. Find side.", "options": {"A": "7 cm", "B": "10 cm", "C": "12 cm", "D": "14 cm"}, "correct_answer": "D"},
    {"id": 46, "difficulty": "medium", "question": "Sum of any two sides > third side. For 3 cm, 4 cm, possible third side:", "options": {"A": "1 cm", "B": "2 cm", "C": "7 cm", "D": "8 cm"}, "correct_answer": "B"},
    {"id": 47, "difficulty": "medium", "question": "In ΔXYZ, ∠X=70°, ∠Y=60°. Find ∠Z.", "options": {"A": "40°", "B": "50°", "C": "60°", "D": "70°"}, "correct_answer": "B"},
    {"id": 48, "difficulty": "medium", "question": "Area=24 cm², base=8 cm. Find height.", "options": {"A": "3 cm", "B": "4 cm", "C": "5 cm", "D": "6 cm"}, "correct_answer": "D"},
    {"id": 49, "difficulty": "medium", "question": "If sides are 7 cm, 24 cm, 25 cm, triangle is:", "options": {"A": "Acute", "B": "Right", "C": "Obtuse", "D": "Isosceles"}, "correct_answer": "B"},
    {"id": 50, "difficulty": "medium", "question": "In right triangle, legs are equal. Each acute angle=?", "options": {"A": "30°", "B": "45°", "C": "60°", "D": "90°"}, "correct_answer": "B"},
    {"id": 51, "difficulty": "medium", "question": "If one angle=110°, other two are 30° and 40°. Triangle is:", "options": {"A": "Possible", "B": "Not possible", "C": "Right", "D": "Equilateral"}, "correct_answer": "B"},
    {"id": 52, "difficulty": "medium", "question": "Angles ratio 3:4:5. Find largest angle.", "options": {"A": "45°", "B": "60°", "C": "75°", "D": "90°"}, "correct_answer": "C"},
    {"id": 53, "difficulty": "medium", "question": "In isosceles triangle, vertex angle=80°. Find base angles sum.", "options": {"A": "80°", "B": "90°", "C": "100°", "D": "120°"}, "correct_answer": "C"},
    {"id": 54, "difficulty": "medium", "question": "Sides 9 cm, 40 cm, 41 cm form which triangle?", "options": {"A": "Acute", "B": "Right", "C": "Obtuse", "D": "Equilateral"}, "correct_answer": "B"},
    {"id": 55, "difficulty": "medium", "question": "If two angles are 70° and 50°, triangle is:", "options": {"A": "Acute", "B": "Obtuse", "C": "Right", "D": "Isosceles"}, "correct_answer": "A"},
    {"id": 56, "difficulty": "medium", "question": "Perimeter of triangle=36 cm. Sides in ratio 3:4:5. Find longest side.", "options": {"A": "9 cm", "B": "12 cm", "C": "15 cm", "D": "18 cm"}, "correct_answer": "C"},
    {"id": 57, "difficulty": "medium", "question": "In ΔABC, ∠A=60°, ∠B=70°. Which side is shortest?", "options": {"A": "AB", "B": "BC", "C": "CA", "D": "All equal"}, "correct_answer": "B"},
    {"id": 58, "difficulty": "medium", "question": "If area=48 cm² and height=12 cm, find base.", "options": {"A": "4 cm", "B": "6 cm", "C": "8 cm", "D": "10 cm"}, "correct_answer": "C"},
    {"id": 59, "difficulty": "medium", "question": "Sides 2 cm, 3 cm, 6 cm:", "options": {"A": "Form triangle", "B": "Do not form triangle", "C": "Form right triangle", "D": "Form obtuse triangle"}, "correct_answer": "B"},
    {"id": 60, "difficulty": "medium", "question": "In right triangle, one acute angle is twice other. Find smaller.", "options": {"A": "30°", "B": "45°", "C": "60°", "D": "90°"}, "correct_answer": "A"},
    {"id": 61, "difficulty": "medium", "question": "If sides are 5 cm, 5 cm, 8 cm, triangle is:", "options": {"A": "Equilateral", "B": "Isosceles", "C": "Scalene", "D": "Right"}, "correct_answer": "B"},
    {"id": 62, "difficulty": "medium", "question": "Angles (3x-10)°, (x+20)°, (2x+10)°. Find largest angle.", "options": {"A": "70°", "B": "80°", "C": "90°", "D": "100°"}, "correct_answer": "D"},
    {"id": 63, "difficulty": "medium", "question": "In equilateral triangle, each exterior angle=?", "options": {"A": "60°", "B": "90°", "C": "120°", "D": "180°"}, "correct_answer": "C"},
    {"id": 64, "difficulty": "medium", "question": "If two sides are 7 cm and 10 cm, third side must be:", "options": {"A": "<17 cm and >3 cm", "B": "<17 cm and >4 cm", "C": "<20 cm and >3 cm", "D": "<20 cm and >4 cm"}, "correct_answer": "A"},
    {"id": 65, "difficulty": "medium", "question": "In ΔPQR, ∠P=50°, ∠Q=60°. Find exterior angle at R.", "options": {"A": "70°", "B": "80°", "C": "110°", "D": "130°"}, "correct_answer": "C"},
    {"id": 66, "difficulty": "medium", "question": "Area of right triangle with legs 6 cm, 8 cm = ?", "options": {"A": "24 cm²", "B": "30 cm²", "C": "36 cm²", "D": "48 cm²"}, "correct_answer": "A"},
    {"id": 67, "difficulty": "medium", "question": "If base=15 cm, area=60 cm², height=?", "options": {"A": "4 cm", "B": "6 cm", "C": "8 cm", "D": "10 cm"}, "correct_answer": "C"},
    {"id": 68, "difficulty": "medium", "question": "Sides 8 cm, 15 cm, 17 cm. Triangle type?", "options": {"A": "Acute", "B": "Right", "C": "Obtuse", "D": "Isosceles"}, "correct_answer": "B"},
    {"id": 69, "difficulty": "medium", "question": "In isosceles triangle, equal sides=13 cm, base=10 cm. Find altitude.", "options": {"A": "10 cm", "B": "11 cm", "C": "12 cm", "D": "13 cm"}, "correct_answer": "C"},
    {"id": 70, "difficulty": "medium", "question": "If angles are 40°, 60°, 80°, triangle is:", "options": {"A": "Acute", "B": "Obtuse", "C": "Right", "D": "Equilateral"}, "correct_answer": "A"},
    {"id": 71, "difficulty": "medium", "question": "Perimeter=45 cm. Sides in ratio 2:3:4. Find smallest side.", "options": {"A": "8 cm", "B": "10 cm", "C": "12 cm", "D": "15 cm"}, "correct_answer": "B"},
    {"id": 72, "difficulty": "medium", "question": "In right triangle, hypotenuse=10 cm, one leg=6 cm. Find area.", "options": {"A": "24 cm²", "B": "30 cm²", "C": "36 cm²", "D": "48 cm²"}, "correct_answer": "A"},
    {"id": 73, "difficulty": "medium", "question": "If two angles are 55° each, third angle=?", "options": {"A": "60°", "B": "65°", "C": "70°", "D": "75°"}, "correct_answer": "C"},
    {"id": 74, "difficulty": "medium", "question": "Sides 5 cm, 12 cm, 13 cm. Find altitude to hypotenuse.", "options": {"A": "60/13 cm", "B": "5 cm", "C": "12 cm", "D": "13 cm"}, "correct_answer": "A"},
    {"id": 75, "difficulty": "medium", "question": "In ΔABC, ∠A=30°, ∠B=70°. Find exterior at C.", "options": {"A": "80°", "B": "100°", "C": "120°", "D": "140°"}, "correct_answer": "B"},
    {"id": 76, "difficulty": "medium", "question": "If base=12 cm, height=9 cm, area=?", "options": {"A": "54 cm²", "B": "72 cm²", "C": "90 cm²", "D": "108 cm²"}, "correct_answer": "A"},
    {"id": 77, "difficulty": "medium", "question": "Angles ratio 1:1:2. Triangle is:", "options": {"A": "Acute", "B": "Right", "C": "Obtuse", "D": "Equilateral"}, "correct_answer": "B"},
    {"id": 78, "difficulty": "medium", "question": "Sides 10 cm, 24 cm, 26 cm. Triangle type?", "options": {"A": "Acute", "B": "Right", "C": "Obtuse", "D": "Isosceles"}, "correct_answer": "B"},
    {"id": 79, "difficulty": "medium", "question": "In isosceles right triangle, hypotenuse=10√2 cm. Find legs.", "options": {"A": "5 cm", "B": "10 cm", "C": "15 cm", "D": "20 cm"}, "correct_answer": "B"},
    {"id": 80, "difficulty": "medium", "question": "If perimeter=30 cm and sides are consecutive integers, find sides.", "options": {"A": "8,10,12", "B": "9,10,11", "C": "7,10,13", "D": "6,10,14"}, "correct_answer": "B"},
    {"id": 81, "difficulty": "hard", "question": "In ΔABC, ∠A=2∠B=3∠C. Find ∠A.", "options": {"A": "60°", "B": "90°", "C": "100°", "D": "120°"}, "correct_answer": "B"},
    {"id": 82, "difficulty": "hard", "question": "Sides are 3x, 4x, 5x. Perimeter=48 cm. Find area.", "options": {"A": "72 cm²", "B": "96 cm²", "C": "120 cm²", "D": "144 cm²"}, "correct_answer": "B"},
    {"id": 83, "difficulty": "hard", "question": "In ΔPQR, ∠P=70°, ∠Q=50°. PS is angle bisector. Find ∠PSQ.", "options": {"A": "100°", "B": "110°", "C": "120°", "D": "130°"}, "correct_answer": "C"},
    {"id": 84, "difficulty": "hard", "question": "If sides are integers and perimeter=15 cm, how many different triangles?", "options": {"A": "3", "B": "4", "C": "5", "D": "6"}, "correct_answer": "B"},
    {"id": 85, "difficulty": "hard", "question": "In right triangle, median to hypotenuse=10 cm. Find area if one leg=16 cm.", "options": {"A": "96 cm²", "B": "120 cm²", "C": "144 cm²", "D": "192 cm²"}, "correct_answer": "A"},
    {"id": 86, "difficulty": "hard", "question": "Angles are in AP with common difference 20°. Find smallest angle.", "options": {"A": "30°", "B": "40°", "C": "50°", "D": "60°"}, "correct_answer": "B"},
    {"id": 87, "difficulty": "hard", "question": "In ΔABC, AB=AC, ∠A=40°. Find angle between altitude from B and bisector of ∠C.", "options": {"A": "20°", "B": "25°", "C": "30°", "D": "35°"}, "correct_answer": "C"},
    {"id": 88, "difficulty": "hard", "question": "If sides are x, x+1, x+2 and triangle is obtuse, smallest possible x?", "options": {"A": "2", "B": "3", "C": "4", "D": "5"}, "correct_answer": "C"},
    {"id": 89, "difficulty": "hard", "question": "In ΔXYZ, ∠X=60°, ∠Y=80°. XZ is extended to W. Find ∠XYW.", "options": {"A": "40°", "B": "60°", "C": "80°", "D": "100°"}, "correct_answer": "D"},
    {"id": 90, "difficulty": "hard", "question": "Area of equilateral triangle=25√3 cm². Find inradius.", "options": {"A": "5/√3 cm", "B": "5√3/2 cm", "C": "5 cm", "D": "10/√3 cm"}, "correct_answer": "A"},
    {"id": 91, "difficulty": "hard", "question": "If two sides are 8 cm, 15 cm and area=60 cm², find third side.", "options": {"A": "13 cm", "B": "17 cm", "C": "19 cm", "D": "21 cm"}, "correct_answer": "B"},
    {"id": 92, "difficulty": "hard", "question": "In ΔABC, ∠B=70°, ∠C=50°. AD ⟂ BC. Find ∠BAD.", "options": {"A": "20°", "B": "30°", "C": "40°", "D": "50°"}, "correct_answer": "A"},
    {"id": 93, "difficulty": "hard", "question": "Sides are 13,14,15 cm. Find altitude to side 14 cm.", "options": {"A": "10 cm", "B": "11 cm", "C": "12 cm", "D": "13 cm"}, "correct_answer": "C"},
    {"id": 94, "difficulty": "hard", "question": "In right triangle, hypotenuse=25 cm, difference of legs=7 cm. Find area.", "options": {"A": "84 cm²", "B": "96 cm²", "C": "108 cm²", "D": "120 cm²"}, "correct_answer": "A"},
    {"id": 95, "difficulty": "hard", "question": "If angles are (x+30)°, (2x-20)°, (3x-50)° and triangle is right, find x.", "options": {"A": "30", "B": "35", "C": "40", "D": "45"}, "correct_answer": "C"},
    {"id": 96, "difficulty": "hard", "question": "In isosceles triangle, equal sides=17 cm, altitude to base=15 cm. Find base.", "options": {"A": "16 cm", "B": "20 cm", "C": "24 cm", "D": "30 cm"}, "correct_answer": "A"},
    {"id": 97, "difficulty": "hard", "question": "Perimeter=32 cm. Sides in ratio 3:5:6. Find area if height to longest side=8 cm.", "options": {"A": "48 cm²", "B": "56 cm²", "C": "64 cm²", "D": "72 cm²"}, "correct_answer": "C"},
    {"id": 98, "difficulty": "hard", "question": "In ΔABC, ∠A=50°, ∠B=60°. Find angle between altitude from C and median from C.", "options": {"A": "5°", "B": "10°", "C": "15°", "D": "20°"}, "correct_answer": "B"},
    {"id": 99, "difficulty": "hard", "question": "If sides are 5x, 12x, 13x and area=270 cm², find perimeter.", "options": {"A": "60 cm", "B": "75 cm", "C": "90 cm", "D": "120 cm"}, "correct_answer": "C"},
    {"id": 100, "difficulty": "hard", "question": "In triangle, one angle=120°, sides including it are 8 cm and 10 cm. Find third side.", "options": {"A": "√244 cm", "B": "14 cm", "C": "2√61 cm", "D": "16 cm"}, "correct_answer": "C"}
  ,
   {"id":101,"difficulty":"easy","question":"A triangle is a polygon with how many sides?","options":{"A":"2","B":"3","C":"4","D":"5"},"correct_answer":"B"},
    {"id":102,"difficulty":"easy","question":"Number of angles in a triangle is:","options":{"A":"2","B":"3","C":"4","D":"6"},"correct_answer":"B"},
    {"id":103,"difficulty":"easy","question":"Triangle having all angles equal is called:","options":{"A":"Isosceles","B":"Scalene","C":"Equilateral","D":"Right"},"correct_answer":"C"},
    {"id":104,"difficulty":"easy","question":"In a right triangle, the largest angle is:","options":{"A":"Acute","B":"Obtuse","C":"Right","D":"Straight"},"correct_answer":"C"},
    {"id":105,"difficulty":"easy","question":"Which triangle has exactly two equal sides?","options":{"A":"Scalene","B":"Right","C":"Isosceles","D":"Equilateral"},"correct_answer":"C"},
    {"id":106,"difficulty":"easy","question":"Sum of interior angles of any triangle is:","options":{"A":"90°","B":"120°","C":"180°","D":"360°"},"correct_answer":"C"},
    {"id":107,"difficulty":"easy","question":"Side opposite the right angle is called:","options":{"A":"Median","B":"Altitude","C":"Base","D":"Hypotenuse"},"correct_answer":"D"},
    {"id":108,"difficulty":"easy","question":"Triangle with all sides unequal is:","options":{"A":"Equilateral","B":"Isosceles","C":"Scalene","D":"Right"},"correct_answer":"C"},
    {"id":109,"difficulty":"easy","question":"In an equilateral triangle, each angle measures:","options":{"A":"30°","B":"45°","C":"60°","D":"90°"},"correct_answer":"C"},
    {"id":110,"difficulty":"easy","question":"Which triangle has one angle greater than 90°?","options":{"A":"Acute","B":"Right","C":"Obtuse","D":"Equilateral"},"correct_answer":"C"},
    {"id":111,"difficulty":"easy","question":"How many medians does a triangle have?","options":{"A":"1","B":"2","C":"3","D":"4"},"correct_answer":"C"},
    {"id":112,"difficulty":"easy","question":"In a triangle, the longest side lies opposite the:","options":{"A":"Smallest angle","B":"Largest angle","C":"Right angle only","D":"Any angle"},"correct_answer":"B"},
    {"id":113,"difficulty":"easy","question":"Area of a triangle depends on:","options":{"A":"Only sides","B":"Only angles","C":"Base and height","D":"Perimeter"},"correct_answer":"C"},
    {"id":114,"difficulty":"easy","question":"A triangle can have at most how many right angles?","options":{"A":"0","B":"1","C":"2","D":"3"},"correct_answer":"B"},
    {"id":115,"difficulty":"easy","question":"Which of the following always forms a triangle?","options":{"A":"2,3,5","B":"3,4,6","C":"4,5,10","D":"5,5,12"},"correct_answer":"B"},

   
    {"id":116,"difficulty":"medium","question":"If two angles of a triangle are 40° and 65°, find the third angle.","options":{"A":"65°","B":"70°","C":"75°","D":"85°"},"correct_answer":"C"},
    {"id":117,"difficulty":"medium","question":"In an isosceles triangle, vertex angle is 50°. Each base angle is:","options":{"A":"55°","B":"60°","C":"65°","D":"70°"},"correct_answer":"C"},
    {"id":118,"difficulty":"medium","question":"Sides of a triangle are in ratio 2:3:4. Largest angle is opposite which side?","options":{"A":"Smallest","B":"Middle","C":"Largest","D":"Any"},"correct_answer":"C"},
    {"id":119,"difficulty":"medium","question":"If perimeter of equilateral triangle is 27 cm, side length is:","options":{"A":"6 cm","B":"7 cm","C":"8 cm","D":"9 cm"},"correct_answer":"D"},
    {"id":120,"difficulty":"medium","question":"Which set of sides forms a right triangle?","options":{"A":"6,8,10","B":"5,6,7","C":"7,8,9","D":"8,9,10"},"correct_answer":"A"},
    {"id":121,"difficulty":"medium","question":"If base of triangle is doubled and height is same, area becomes:","options":{"A":"Half","B":"Same","C":"Double","D":"Triple"},"correct_answer":"C"},
    {"id":122,"difficulty":"medium","question":"In ΔABC, ∠A = 30°, ∠B = 90°. Find ∠C.","options":{"A":"30°","B":"45°","C":"60°","D":"90°"},"correct_answer":"C"},
    {"id":123,"difficulty":"medium","question":"Which triangle has angles 45°, 45°, 90°?","options":{"A":"Scalene","B":"Equilateral","C":"Right isosceles","D":"Obtuse"},"correct_answer":"C"},
    {"id":124,"difficulty":"medium","question":"If sides are 7 cm, 24 cm, 25 cm, triangle is:","options":{"A":"Acute","B":"Right","C":"Obtuse","D":"Isosceles"},"correct_answer":"B"},
    {"id":125,"difficulty":"medium","question":"If area = 30 cm² and base = 10 cm, height is:","options":{"A":"3 cm","B":"4 cm","C":"5 cm","D":"6 cm"},"correct_answer":"A"},
    {"id":126,"difficulty":"medium","question":"In triangle, smallest side is opposite:","options":{"A":"Largest angle","B":"Right angle","C":"Smallest angle","D":"Any angle"},"correct_answer":"C"},
    {"id":127,"difficulty":"medium","question":"Angles are in ratio 1:1:2. Triangle is:","options":{"A":"Acute","B":"Right","C":"Obtuse","D":"Equilateral"},"correct_answer":"B"},
    {"id":128,"difficulty":"medium","question":"In an obtuse triangle, number of obtuse angles is:","options":{"A":"0","B":"1","C":"2","D":"3"},"correct_answer":"B"},
    {"id":129,"difficulty":"medium","question":"If one angle is 100°, the triangle must be:","options":{"A":"Acute","B":"Right","C":"Obtuse","D":"Equilateral"},"correct_answer":"C"},
    {"id":130,"difficulty":"medium","question":"Which triangle always has equal angles?","options":{"A":"Right","B":"Scalene","C":"Isosceles","D":"Equilateral"},"correct_answer":"D"},
    {"id":131,"difficulty":"medium","question":"If two sides are 9 cm and 12 cm, third side can be:","options":{"A":"3 cm","B":"21 cm","C":"5 cm","D":"25 cm"},"correct_answer":"C"},
    {"id":132,"difficulty":"medium","question":"In right triangle, sum of acute angles equals:","options":{"A":"60°","B":"90°","C":"120°","D":"180°"},"correct_answer":"B"},
    {"id":133,"difficulty":"medium","question":"If angles are 50°, 50°, triangle is:","options":{"A":"Scalene","B":"Right","C":"Isosceles","D":"Equilateral"},"correct_answer":"C"},
    {"id":134,"difficulty":"medium","question":"Area of triangle with base 14 cm and height 6 cm is:","options":{"A":"42 cm²","B":"56 cm²","C":"84 cm²","D":"96 cm²"},"correct_answer":"B"},
    {"id":135,"difficulty":"medium","question":"Which triangle has all angles less than 90°?","options":{"A":"Right","B":"Obtuse","C":"Acute","D":"Isosceles"},"correct_answer":"C"},
    {"id":136,"difficulty":"medium","question":"If sides are 4 cm, 4 cm, 6 cm, triangle is:","options":{"A":"Scalene","B":"Isosceles","C":"Right","D":"Equilateral"},"correct_answer":"B"},
    {"id":137,"difficulty":"medium","question":"If one angle is 30°, one is 60°, third is:","options":{"A":"60°","B":"90°","C":"120°","D":"150°"},"correct_answer":"B"},
    {"id":138,"difficulty":"medium","question":"Which measurement decides area of triangle?","options":{"A":"Perimeter","B":"Angles","C":"Base & height","D":"Sides only"},"correct_answer":"C"},
    {"id":139,"difficulty":"medium","question":"If sides are 10 cm, 10 cm, 10 cm, triangle is:","options":{"A":"Scalene","B":"Right","C":"Isosceles","D":"Equilateral"},"correct_answer":"D"},
    {"id":140,"difficulty":"medium","question":"If base is fixed, area depends on:","options":{"A":"Side","B":"Angle","C":"Height","D":"Perimeter"},"correct_answer":"C"},
    {"id":141,"difficulty":"medium","question":"Which triangle has exactly one obtuse angle?","options":{"A":"Right","B":"Acute","C":"Obtuse","D":"Equilateral"},"correct_answer":"C"},
    {"id":142,"difficulty":"medium","question":"If sides are 6 cm, 8 cm, 10 cm, hypotenuse is:","options":{"A":"6 cm","B":"8 cm","C":"10 cm","D":"Cannot say"},"correct_answer":"C"},
    {"id":143,"difficulty":"medium","question":"If one angle is twice another and third is 30°, triangle is:","options":{"A":"Acute","B":"Right","C":"Obtuse","D":"Equilateral"},"correct_answer":"B"},
    {"id":144,"difficulty":"medium","question":"Largest angle in a triangle lies opposite:","options":{"A":"Smallest side","B":"Any side","C":"Largest side","D":"Equal side"},"correct_answer":"C"},
    {"id":145,"difficulty":"medium","question":"If triangle has sides 5 cm, 12 cm, 13 cm, area is:","options":{"A":"30 cm²","B":"40 cm²","C":"50 cm²","D":"60 cm²"},"correct_answer":"A"},

    {"id":146,"difficulty":"hard","question":"If angles are in ratio 2:3:5, find largest angle.","options":{"A":"72°","B":"90°","C":"100°","D":"120°"},"correct_answer":"B"},
    {"id":147,"difficulty":"hard","question":"In right triangle, hypotenuse is 13 cm and one leg is 5 cm. Find area.","options":{"A":"30 cm²","B":"60 cm²","C":"24 cm²","D":"36 cm²"},"correct_answer":"C"},
    {"id":148,"difficulty":"hard","question":"If perimeter of triangle is 36 cm and sides are consecutive integers, find largest side.","options":{"A":"11 cm","B":"12 cm","C":"13 cm","D":"14 cm"},"correct_answer":"C"},
    {"id":149,"difficulty":"hard","question":"In isosceles triangle, equal sides are 13 cm and base is 10 cm. Find area.","options":{"A":"50 cm²","B":"60 cm²","C":"65 cm²","D":"70 cm²"},"correct_answer":"B"},
    {"id":150,"difficulty":"hard","question":"If one angle of triangle is 120° and other two are equal, find each of them.","options":{"A":"20°","B":"30°","C":"40°","D":"60°"},"correct_answer":"C"}
]
}