$Angle relationships: stretch: math worksheet for Grade 10, page 1 preview$

Math worksheet · Mathematics

Angle relationships: stretch · Grade 10

Use angle facts: complementary, supplementary, vertical and triangle sums. 16 problems at a stretch level for Grade 10, with an answer key for grown-ups.

Grade 10 · ages 15 to 16
Hard
25 to 35 minutes
2 pages
Free

The answer key is a separate page for grown-ups. Sign in to download it.

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The 16 problems on the sheet

Directions: Find each missing angle.

1. Complementary to 37°:
2. Complementary to 39°:
3. Supplementary to 62°:
4. Interior angle sum of a octagon:
5. Triangle angles 67° and 92°. Third angle:
6. Supplementary to 72°:
7. Complementary to 12°:
8. Complementary to 20°:
9. Triangle angles 12° and 37°. Third angle:
10. Supplementary to 123°:
11. Complementary to 16°:
12. Triangle angles 17° and 42°. Third angle:
13. Complementary to 15°:
14. Complementary to 63°:
15. Complementary to 21°:
16. Triangle angles 58° and 83°. Third angle:

What your child practices

Your child practices math for Grade 10 with this math worksheet.

Grades and ages: Grade 10, ages 15 to 16
Time: About 25 to 35 minutes
Subject: Mathematics
Level: Hard for Grade 10
Answer key: Yes, for grown-ups who sign in
Printing: 2 pages, US Letter or A4, low-ink option
Updated: October 15, 2026

How to use it

Try the first question together so the format is clear. Then let your child work through the rest, showing their thinking on the page. It is one of the harder sheets for Grade 10, best once the basics of the topic are secure. Its 2 pages split well across two sittings.

An answer key comes with it as a separate page that grown-ups download after signing in.

Tip for grown-ups: Check the first three problems together before your child carries on alone; most mix-ups show early.

Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.