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Class 8 Maths — Mensuration

Find areas of trapeziums and circles, and volumes and surface areas of cuboids and cylinders.

Name: ________________________

  1. 1.Sort each formula by what it measures.

    Groups: Measures area · Measures volume

    • π × r × r
    • length × width
    • edge × edge × edge
    • π × r × r × h
    • 2 × π × r × h
    • length × width × height

  2. 2.A trapezium has parallel sides of 10 cm and 6 cm, and a height of 4 cm. What is its area, in square centimetres?

  3. 3.A circle has a radius of 14 cm. Take π = 22/7. What is its area, in square centimetres?

  4. 4.A cuboid is 12 cm long, 8 cm wide and 5 cm tall. What is its total surface area, in square centimetres?

  5. 5.A circle has a radius of 14 cm. Take π = 22/7. What is its circumference, in centimetres?

  6. 6.A cube has edges of 5 cm. What is its volume, in cubic centimetres?

  7. 7.A cuboid is 12 cm long, 8 cm wide and 5 cm tall. What is its volume, in cubic centimetres?

  8. 8.A cylinder has a radius of 7 cm and a height of 10 cm. Take π = 22/7. What is its total surface area, in square centimetres?

Answer key — Class 8 Maths — Mensuration

  1. 1. π × r × r → Measures area; length × width → Measures area; 2 × π × r × h → Measures area; length × width × height → Measures volume; π × r × r × h → Measures volume; edge × edge × edge → Measures volume
  2. 2. 32
  3. 3. 616
  4. 4. 392
  5. 5. 88
  6. 6. 125
  7. 7. 480
  8. 8. 748