✏️ Similar Figures: Practice A (G-SRT.A.2)

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Use similarity transformations; find missing sides using scale factors. Solve each problem.

1. Triangles are similar. Sides 7 and 12 correspond to 28 and x. x = ___

2. Triangles are similar. Sides 7 and 6 correspond to 14 and x. x = ___

3. Triangles are similar. Sides 9 and 4 correspond to 18 and x. x = ___

4. Triangles are similar. Sides 2 and 8 correspond to 6 and x. x = ___

5. Triangles are similar. Sides 2 and 2 correspond to 4 and x. x = ___

6. Triangles are similar. Sides 4 and 8 correspond to 6 and x. x = ___

7. Triangles are similar. Sides 10 and 5 correspond to 20 and x. x = ___

8. Triangles are similar. Sides 2 and 8 correspond to 5 and x. x = ___

9. Triangles are similar. Sides 7 and 10 correspond to 28 and x. x = ___

10. Triangles are similar. Sides 7 and 12 correspond to 17.5 and x. x = ___

11. Triangles are similar. Sides 2 and 6 correspond to 6 and x. x = ___

12. Triangles are similar. Sides 9 and 9 correspond to 22.5 and x. x = ___

Answer key: 1) 48 · 2) 12 · 3) 8 · 4) 24 · 5) 4 · 6) 12 · 7) 10 · 8) 20 · 9) 40 · 10) 30 · 11) 18 · 12) 22.5

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Worksheets › Grade 10 Math (Geometry) › Similar Figures › Similar Figures

Grade 10 (ages 15–16)Numbers & mathsFree printable PDF

About this grade 10 worksheet

Free Grade 10 Geometry math worksheet (Common Core G-SRT.A.2): similar figures — twelve practice problems, with answer key. Skill: Use similarity transformations; find missing sides using scale factors. Level: Grade 10 — also suits Year 11 (UK).

For teachers: skills & standards

CCSS G-SRT.A.2: Use similarity transformations; find missing sides using scale factors
Works as a morning-work page, a centre/station activity, homework or an early-finisher task.

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What age is it for?

It is designed for Grade 10 (ages 15–16), but use it with any child who is ready.

What skills does it build?

Use similarity transformations; find missing sides using scale factors.

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