📝 Pythagorean Theorem: Practice B (8.G.B.7)

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Apply the Pythagorean Theorem to find unknown side lengths. Solve each problem.

1. Right triangle: leg 18, hypotenuse 82. Other leg = ___

2. Right triangle: leg 24, hypotenuse 30. Other leg = ___

3. Right triangle: legs 6 and 8. Hypotenuse = ___

4. Right triangle: leg 20, hypotenuse 29. Other leg = ___

5. Right triangle: leg 42, hypotenuse 58. Other leg = ___

6. Right triangle: legs 9 and 12. Hypotenuse = ___

7. Right triangle: leg 40, hypotenuse 41. Other leg = ___

8. Right triangle: legs 7 and 24. Hypotenuse = ___

9. Right triangle: leg 16, hypotenuse 34. Other leg = ___

10. Right triangle: leg 12, hypotenuse 13. Other leg = ___

11. Right triangle: legs 14 and 48. Hypotenuse = ___

12. Right triangle: leg 3, hypotenuse 5. Other leg = ___

Answer key: 1) 80 · 2) 18 · 3) 10 · 4) 21 · 5) 40 · 6) 15 · 7) 9 · 8) 25 · 9) 30 · 10) 5 · 11) 50 · 12) 4

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Worksheets › Grade 8 Math › Pythagorean Theorem › Pythagorean Theorem

Grade 8 (ages 13–14)Numbers & mathsFree printable PDF

About this grade 8 worksheet

Free Grade 8 math worksheet (Common Core 8.G.B.7): pythagorean theorem — a second set of twelve practice problems, with answer key. Skill: Apply the Pythagorean Theorem to find unknown side lengths. Level: Grade 8 — also suits Year 9 (UK).

For teachers: skills & standards

CCSS 8.G.B.7: Apply the Pythagorean Theorem to find unknown side lengths
Works as a morning-work page, a centre/station activity, homework or an early-finisher task.

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It is designed for Grade 8 (ages 13–14), but use it with any child who is ready.

What skills does it build?

Apply the Pythagorean Theorem to find unknown side lengths.

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More “Pythagorean Theorem” printables (8.g.b.7: apply the pythagorean theorem to find unknown side lengths)

Pythagorean Theorem: Practice A (8.G.B.7) · Pythagorean Theorem: Word Problems (8.G.B.7) · Pythagorean Theorem: Show Your Thinking (8.G.B.7) · Pythagorean Theorem: Quick Check (8.G.B.7)

All 5 pythagorean theorem sheets → · Grade 8 Math: all 10 skills → · All Common Core grades

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