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Grade 3 Math — Perimeter and area

Find the perimeter and the area of rectangles, squares and shapes built from them, and measure area by counting squares.

Name: ________________________

  1. 1.A square has sides of 7 inches. What is its perimeter, in inches? Give just the number.

  2. 2.An L-shape is made from a rectangle 10 inches by 4 inches with a square of side 3 inches cut out of one corner. What is its area, in square inches? Give just the number.

  3. 3.A rectangle is 9 inches long and 4 inches wide. What is its area, in square inches? Give just the number.

  4. 4.A rectangle has an area of 48 square inches and a length of 8 inches. How wide is it, in inches? Give just the number.

  5. 5.A square has sides of 7 inches. What is its area, in square inches? Give just the number.

  6. 6.A shape drawn on squared paper covers 12 full squares and 6 half squares. What is its area, in squares?

  7. 7.Which of these rectangles has the largest area?

    • a) 6 by 5
    • b) 9 by 2
    • c) 7 by 4
    • d) 8 by 3

  8. 8.Put these rectangles in order by area, smallest first.

    • 2 by 6
    • 3 by 5
    • 5 by 4
    • 4 by 4
    • 3 by 6

Answer key — Grade 3 Math — Perimeter and area

  1. 1. 28
  2. 2. 31
  3. 3. 36
  4. 4. 6
  5. 5. 49
  6. 6. 15
  7. 7. a) 6 by 5
  8. 8. 1. 2 by 6 2. 3 by 5 3. 4 by 4 4. 3 by 6 5. 5 by 4