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Perimetre of a right triangle from its legs

Grade 8 math · Fieldbook Learning

Name ______________________ Date __________

Find the hypotenuse with the Pythagorean theorem, then add the three sides.

  1. A right triangle has legs of 15 km and 8 km. What is its perimetre, in km?
  2. A right triangle has legs of 45 cm and 24 cm. What is its perimetre, in cm?
  3. A right triangle has legs of 42 cm and 40 cm. What is its perimetre, in cm?
  4. A right triangle has legs of 7 cm and 24 cm. What is its perimetre, in cm?
  5. A right triangle has legs of 11 km and 60 km. What is its perimetre, in km?
  6. A right triangle has legs of 18 km and 80 km. What is its perimetre, in km?
  7. A right triangle has legs of 11 km and 60 km. What is its perimetre, in km?
  8. A right triangle has legs of 24 m and 7 m. What is its perimetre, in m?
  9. A right triangle has legs of 120 km and 27 km. What is its perimetre, in km?
  10. A right triangle has legs of 8 km and 15 km. What is its perimetre, in km?
  11. A right triangle has legs of 100 cm and 105 cm. What is its perimetre, in cm?
  12. A right triangle has legs of 105 cm and 36 cm. What is its perimetre, in cm?
  13. A right triangle has legs of 240 cm and 54 cm. What is its perimetre, in cm?
  14. A right triangle has legs of 300 km and 55 km. What is its perimetre, in km?
  15. A right triangle has legs of 6 cm and 8 cm. What is its perimetre, in cm?
  16. A right triangle has legs of 10 m and 24 m. What is its perimetre, in m?
  17. A right triangle has legs of 144 m and 42 m. What is its perimetre, in m?
  18. A right triangle has legs of 20 m and 21 m. What is its perimetre, in m?
  19. A right triangle has legs of 63 m and 60 m. What is its perimetre, in m?
  20. A right triangle has legs of 72 cm and 21 cm. What is its perimetre, in cm?
More free practice: fieldbooklearning.com/ca/practice/grade-8/perimeter-of-a-right-triangle-from-its-legs/

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Answer key: Perimetre of a right triangle from its legs

  1. 40
  2. 120
  3. 140
  4. 56
  5. 132
  6. 180
  7. 132
  8. 56
  9. 270
  10. 40
  11. 350
  12. 252
  13. 540
  14. 660
  15. 24
  16. 60
  17. 336
  18. 70
  19. 210
  20. 168