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Grade 7 complementary and vertical angles worksheets

7.G.B.5 Measurement and geometry

Printable complementary and vertical angles worksheets for grade 7, aligned to Common Core standard 7.G.B.5. Add to 90°, or equal.

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Sample problems

  1. Two angles are complementary. One measures 10°. What is the other? 80°
  2. Two angles are complementary. One measures 44°. What is the other? 46°
  3. Two angles are complementary. One measures 16°. What is the other? 74°
  4. Two lines cross. One of the angles formed is 81°. What is the angle directly opposite it? 81°
  5. Two lines cross. One of the angles formed is 72°. What is the angle directly opposite it? 72°
  6. Two angles are complementary. One measures 64°. What is the other? 26°
  7. Two lines cross. One of the angles formed is 154°. What is the angle directly opposite it? 154°
  8. Two lines cross. One of the angles formed is 75°. What is the angle directly opposite it? 75°

These eight are one sample at medium difficulty — the generator makes a different set every time.

A worked example

Two angles are complementary. One measures 10°. What is the other? 80°

  1. Complementary angles add up to 90°
  2. 90 − 10 = 80°

Every problem on the answer key can show its steps like this — turn on “Show steps” before downloading.

About these worksheets

Each problem states its own measurements, so the reasoning is the same but the arithmetic is new every time. Every sheet is generated fresh, so you can print a new one on the same skill as often as you need — different numbers, same difficulty.

Pick how many problems you want and whether they should be easy, medium or hard, then download a PDF with a matching answer key. The key can show the worked steps for every problem, which is what a parent needs to see where a wrong answer went wrong.

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