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Celeste International School

Grade 5 · Worksheet

Exploring measures

Area of rectangles & triangles

Name: ______________________________Date: ______________Score: ______ / 20
  1. 1.

    A rectangle is 8 m long and 4 m wide. What is its area?

    m²
  2. 2.

    A square has sides of 5 cm. What is its area?

    cm²
  3. 3.

    Asok has a piece of paper 30 cm long and 21 cm wide. What is its area?

    cm²
  4. 4.

    A square is a type of rectangle.

    True False
  5. 5.

    A rectangle is 10 m long and 5 m wide. What is its area?

    m²
  6. 6.

    A rectangle 4 cm by 4 cm is cut in half diagonally. What is the area of one triangle?

    cm²
  7. 7.

    A rectangle 2 cm by 6 cm is cut in half diagonally. What is the area of one triangle?

    cm²
  8. 8.

    When a rectangle is cut in half diagonally, each triangle has half the area of the rectangle.

    True False
  9. 9.

    A triangle has an area of 16 m². It is half of a rectangle. What is the area of the rectangle?

    m²
  10. 10.

    A triangle is half of a rectangle that has an area of 12 cm². What is the area of the triangle?

    1. A24 cm²
    2. B6 cm²
    3. C12 cm²
    4. D3 cm²
  11. 11.

    Each square on centimetre squared paper has an area of 1 cm².

    True False
  12. 12.

    Each triangular biscuit takes 12.5 cm² of icing. One tub of icing covers 340 cm². How many whole biscuits can be covered?

  13. 13.

    Put these triangle areas in order, from smallest to largest.

    Write the order (smallest to largest) in the boxes:

    • ?10 cm²
    • ?6 cm²
    • ?8 cm²
  14. 14.

    How many degrees is a three-quarter turn?

    °
  15. 15.

    A triangle has sides 7 cm, 7 cm and 10 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
  16. 16.

    What type of angle is 108°?

    1. AAcute
    2. BRight angle
    3. CObtuse
  17. 17.

    A triangle has sides 10 cm, 10 cm and 12 cm. What type is it?

    1. AEquilateral
    2. BIsosceles
    3. CScalene
  18. 18.

    What is the area of a rectangle 12 cm by 4 cm?

    cm²
  19. 19.

    What is the area of a rectangle 19 m by 5 m?

    m²
  20. 20.

    Which angle is bigger, 14° or 157°?

    1. A14°
    2. B157°
Celeste International School

Answer key

Exploring measures — Area of rectangles & triangles

  1. 1.32 m²
  2. 2.25 cm²
  3. 3.630 cm²
  4. 4.True
  5. 5.50 m²
  6. 6.8 cm²
  7. 7.6 cm²
  8. 8.True
  9. 9.32 m²
  10. 10.B. 6 cm²
  11. 11.True
  12. 12.27
  13. 13.6 cm², 8 cm², 10 cm²
  14. 14.270 °
  15. 15.B. Isosceles
  16. 16.C. Obtuse
  17. 17.B. Isosceles
  18. 18.48 cm²
  19. 19.95 m²
  20. 20.B. 157°