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Perimeter of a rectangle from its area and width

Grade 7 math · Fieldbook Learning

Name ______________________ Date __________

Find the missing side from the area, then find the perimeter.

  1. A rectangle has an area of 98 cm² and a width of 14 cm. What is its perimeter in cm?
  2. A rectangle has an area of 52 cm² and a width of 13 cm. What is its perimeter in cm?
  3. A rectangle has an area of 84 cm² and a width of 14 cm. What is its perimeter in cm?
  4. A rectangle has an area of 24 cm² and a width of 3 cm. What is its perimeter in cm?
  5. A rectangle has an area of 204 cm² and a width of 17 cm. What is its perimeter in cm?
  6. A rectangle has an area of 266 cm² and a width of 14 cm. What is its perimeter in cm?
  7. A rectangle has an area of 24 cm² and a width of 12 cm. What is its perimeter in cm?
  8. A rectangle has an area of 26 cm² and a width of 2 cm. What is its perimeter in cm?
  9. A rectangle has an area of 20 cm² and a width of 2 cm. What is its perimeter in cm?
  10. A rectangle has an area of 60 cm² and a width of 4 cm. What is its perimeter in cm?
  11. A rectangle has an area of 33 cm² and a width of 3 cm. What is its perimeter in cm?
  12. A rectangle has an area of 247 cm² and a width of 13 cm. What is its perimeter in cm?
  13. A rectangle has an area of 486 cm² and a width of 27 cm. What is its perimeter in cm?
  14. A rectangle has an area of 180 cm² and a width of 30 cm. What is its perimeter in cm?
  15. A rectangle has an area of 60 cm² and a width of 30 cm. What is its perimeter in cm?
  16. A rectangle has an area of 4 cm² and a width of 2 cm. What is its perimeter in cm?
  17. A rectangle has an area of 370 cm² and a width of 10 cm. What is its perimeter in cm?
  18. A rectangle has an area of 32 cm² and a width of 4 cm. What is its perimeter in cm?
  19. A rectangle has an area of 775 cm² and a width of 31 cm. What is its perimeter in cm?
  20. A rectangle has an area of 630 cm² and a width of 35 cm. What is its perimeter in cm?
More free practice: fieldbooklearning.com/practice/grade-7/perimeter-of-a-rectangle-from-its-area-and-width/

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Answer key: Perimeter of a rectangle from its area and width

  1. 42
  2. 34
  3. 40
  4. 22
  5. 58
  6. 66
  7. 28
  8. 30
  9. 24
  10. 38
  11. 28
  12. 64
  13. 90
  14. 72
  15. 64
  16. 8
  17. 94
  18. 24
  19. 112
  20. 106