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Test whether a triangle is right-angled

8th grade (Year 9 in England) · 16 questions · Common Core: 8.G.B.6 · England: KS3 Geometry and measures, GCSE Foundation Geometry and measures

Name

Date

Score/ 16

  1. Question 1

    Tariq builds a garden frame with sides 5 dm and 12 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  2. Question 2

    A triangle has sides 7, 24 and 25. Is it a right triangle?

    • A. Yes
    • B. No

  3. Question 3

    Omar builds a garden frame with sides 3 dm and 4 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  4. Question 4

    A triangle has sides 7, 24 and 25. Is it a right triangle?

    • A. Yes
    • B. No

  5. Question 5

    Kofi builds a garden frame with sides 24 dm and 45 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  6. Question 6

    A triangle has sides 15, 36 and 41. Is it a right triangle?

    • A. Yes
    • B. No

  7. Question 7

    Liam builds a garden frame with sides 5 dm and 12 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  8. Question 8

    A triangle has sides 15, 36 and 41. Is it a right triangle?

    • A. Yes
    • B. No

  9. Question 9

    Isla builds a garden frame with sides 8 dm and 15 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  10. Question 10

    A triangle has sides 15, 36 and 39. Is it a right triangle?

    • A. Yes
    • B. No

  11. Question 11

    Ana builds a garden frame with sides 24 dm and 45 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  12. Question 12

    A triangle has sides 3, 4 and 6. Is it a right triangle?

    • A. Yes
    • B. No

  13. Question 13

    Kwame builds a garden frame with sides 8 dm and 15 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  14. Question 14

    A triangle has sides 5, 12 and 13. Is it a right triangle?

    • A. Yes
    • B. No

  15. Question 15

    Arjun builds a garden frame with sides 9 dm and 12 dm and wants a perfect right-angled corner. How long should the diagonal brace be, in dm?

    Answer

  16. Question 16

    A triangle has sides 9, 12 and 15. Is it a right triangle?

    • A. Yes
    • B. No

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Answer key: Test whether a triangle is right-angled

  1. 1. 13

  2. 2. A. Yes

  3. 3. 5

  4. 4. A. Yes

  5. 5. 51

  6. 6. B. No

  7. 7. 13

  8. 8. B. No

  9. 9. 17

  10. 10. A. Yes

  11. 11. 51

  12. 12. B. No

  13. 13. 17

  14. 14. A. Yes

  15. 15. 15

  16. 16. A. Yes