FreeMath
Grade 3easy

Perimeter Practice

Practice finding the perimeter of rectangles, squares, and triangles. Perimeter is the distance around the outside of a shape.

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All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

  1. 1.Find the perimeter of a rectangle with length 8 cm and width 5 cm.
  2. 2.Find the perimeter of a square with sides of 7 m.
  3. 3.Find the perimeter of a triangle with sides 5 cm, 6 cm, and 7 cm.
  4. 4.Find the perimeter of a rectangle with length 12 in and width 4 in.
  5. 5.Find the perimeter of a square with sides of 9 ft.
  6. 6.Find the perimeter of an equilateral triangle with sides of 10 cm.
  7. 7.Find the perimeter of a rectangle with length 15 m and width 8 m.
  8. 8.Find the perimeter of a square with sides of 12 cm.
  9. 9.Find the perimeter of a triangle with sides 8 in, 10 in, and 12 in.
  10. 10.Find the perimeter of a rectangle with length 20 ft and width 10 ft.
  11. 11.A garden is 25 m long and 15 m wide. What is the perimeter?
  12. 12.A square room has sides of 14 ft. What is the perimeter?
  13. 13.Find the perimeter of a rectangle with length 18 cm and width 11 cm.
  14. 14.A triangular sign has sides of 4 ft, 4 ft, and 6 ft. What is the perimeter?
  15. 15.Find the perimeter of a square with sides of 25 m.
  16. 16.A rectangular pool is 50 m long and 25 m wide. What is the perimeter?
  17. 17.Find the perimeter of an isosceles triangle with two sides of 8 cm and a base of 6 cm.
  18. 18.A square playground has sides of 30 m. What is the perimeter?
  19. 19.Find the perimeter of a rectangle with length 9 in and width 6 in.
  20. 20.A frame is 16 cm by 12 cm. What is the perimeter?
Show answer key
  1. 1.Find the perimeter of a rectangle with length 8 cm and width 5 cm. Answer: 26 cm
  2. 2.Find the perimeter of a square with sides of 7 m. Answer: 28 m
  3. 3.Find the perimeter of a triangle with sides 5 cm, 6 cm, and 7 cm. Answer: 18 cm
  4. 4.Find the perimeter of a rectangle with length 12 in and width 4 in. Answer: 32 in
  5. 5.Find the perimeter of a square with sides of 9 ft. Answer: 36 ft
  6. 6.Find the perimeter of an equilateral triangle with sides of 10 cm. Answer: 30 cm
  7. 7.Find the perimeter of a rectangle with length 15 m and width 8 m. Answer: 46 m
  8. 8.Find the perimeter of a square with sides of 12 cm. Answer: 48 cm
  9. 9.Find the perimeter of a triangle with sides 8 in, 10 in, and 12 in. Answer: 30 in
  10. 10.Find the perimeter of a rectangle with length 20 ft and width 10 ft. Answer: 60 ft
  11. 11.A garden is 25 m long and 15 m wide. What is the perimeter? Answer: 80 m
  12. 12.A square room has sides of 14 ft. What is the perimeter? Answer: 56 ft
  13. 13.Find the perimeter of a rectangle with length 18 cm and width 11 cm. Answer: 58 cm
  14. 14.A triangular sign has sides of 4 ft, 4 ft, and 6 ft. What is the perimeter? Answer: 14 ft
  15. 15.Find the perimeter of a square with sides of 25 m. Answer: 100 m
  16. 16.A rectangular pool is 50 m long and 25 m wide. What is the perimeter? Answer: 150 m
  17. 17.Find the perimeter of an isosceles triangle with two sides of 8 cm and a base of 6 cm. Answer: 22 cm
  18. 18.A square playground has sides of 30 m. What is the perimeter? Answer: 120 m
  19. 19.Find the perimeter of a rectangle with length 9 in and width 6 in. Answer: 30 in
  20. 20.A frame is 16 cm by 12 cm. What is the perimeter? Answer: 56 cm

About This Practice

This practice set includes 20 perimeter problems for third graders. Understanding perimeter is essential for measurement and real-world applications like fencing and borders.

Want more practice? See all Grade 3 practice →