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Celeste International School

Grade 3 · Worksheet

Area & perimeter

Area & perimeter of rectangles

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

    A rectangle is 4 cm long and 3 cm wide. What is its area?

    cm²
  2. 2.

    A rectangle is 4 cm long and 3 cm wide. What is its perimeter?

    cm
  3. 3.

    How do you find the area of a rectangle?

    1. AAdd all the sides
    2. BMultiply the length by the width
    3. CCount the corners
    4. DMultiply two sides by 2
  4. 4.

    How do you find the perimeter of a rectangle?

    1. AMultiply length by width
    2. BAdd the lengths of all four sides
    3. CCount the squares inside
    4. DMultiply the corners
  5. 5.

    A rectangle is 5 cm long and 2 cm wide. What is its area?

    cm²
  6. 6.

    A rectangle is 5 cm long and 2 cm wide. What is its perimeter?

    cm
  7. 7.

    A rectangle is 6 cm long and 3 cm wide. What is its area?

    cm²
  8. 8.

    A rectangle is 6 cm long and 3 cm wide. What is its perimeter?

    cm
  9. 9.

    A rectangle has 3 rows of 8 squares. What is its area?

    cm²
  10. 10.

    A rectangle is 8 cm long and 3 cm wide. What is its perimeter?

    cm
  11. 11.

    A rectangle is 7 cm long and 2 cm wide. What is its area?

    cm²
  12. 12.

    A rectangle is 6 cm long and 5 cm wide. What is its area?

    cm²
  13. 13.

    A square is 6 cm long and 6 cm wide. What is its area?

    cm²
  14. 14.

    A rectangle is 7 cm long and 5 cm wide. What is its area?

    cm²
  15. 15.

    Lila works out a perimeter by measuring two sides of a rectangle and multiplying by 2. Is she correct?

    1. AYes, because the opposite sides are equal
    2. BNo, you must measure all four sides differently
    3. CNo, perimeter is length × width
    4. DOnly for squares
  16. 16.

    A rectangle has 5 squares in each row and 3 rows. What is its area?

    cm²
  17. 17.

    The area of a rectangle 3 cm by 4 cm is 12 cm².

    True False
  18. 18.

    The perimeter of a rectangle 3 cm by 4 cm is 12 cm.

    True False
  19. 19.

    Area is measured in square units such as cm².

    True False
  20. 20.

    A rectangle is 9 cm long and 2 cm wide. What is its area?

    cm²
Celeste International School

Answer key

Area & perimeter — Area & perimeter of rectangles

  1. 1.12 cm²
  2. 2.14 cm
  3. 3.B. Multiply the length by the width
  4. 4.B. Add the lengths of all four sides
  5. 5.10 cm²
  6. 6.14 cm
  7. 7.18 cm²
  8. 8.18 cm
  9. 9.24 cm²
  10. 10.22 cm
  11. 11.14 cm²
  12. 12.30 cm²
  13. 13.36 cm²
  14. 14.35 cm²
  15. 15.A. Yes, because the opposite sides are equal
  16. 16.15 cm²
  17. 17.True
  18. 18.False
  19. 19.True
  20. 20.18 cm²