Grade 7medium

Angle Relationships Practice

Practice angle relationships: complementary angles sum to 90°, supplementary angles sum to 180°, vertical angles are equal.

All 20 Practice Problems

Every question in this set. Solve them on paper, or use the interactive tool above for instant feedback and hints.

1.Complementary to 30°?
2.Supplementary to 110°?
3.Complementary to 45°?
4.Supplementary to 85°?
5.Complementary to 72°?
6.Supplementary to 135°?
7.Complementary to 15°?
8.Supplementary to 90°?
9.Complementary to 55°?
10.Supplementary to 160°?
11.Vertical angle to 40° is?
12.Vertical angle to 115° is?
13.Angle + 35° = 90°. Angle = ?
14.Angle + 120° = 180°. Angle = ?
15.Two angles sum to 90°, one is 28°. Other?
16.Two angles sum to 180°, one is 67°. Other?
17.Complementary to 83°?
18.Supplementary to 45°?
19.Complementary to 1°?
20.Supplementary to 179°?

Show answer key

1.Complementary to 30°? Answer: 60°
2.Supplementary to 110°? Answer: 70°
3.Complementary to 45°? Answer: 45°
4.Supplementary to 85°? Answer: 95°
5.Complementary to 72°? Answer: 18°
6.Supplementary to 135°? Answer: 45°
7.Complementary to 15°? Answer: 75°
8.Supplementary to 90°? Answer: 90°
9.Complementary to 55°? Answer: 35°
10.Supplementary to 160°? Answer: 20°
11.Vertical angle to 40° is? Answer: 40°
12.Vertical angle to 115° is? Answer: 115°
13.Angle + 35° = 90°. Angle = ? Answer: 55°
14.Angle + 120° = 180°. Angle = ? Answer: 60°
15.Two angles sum to 90°, one is 28°. Other? Answer: 62°
16.Two angles sum to 180°, one is 67°. Other? Answer: 113°
17.Complementary to 83°? Answer: 7°
18.Supplementary to 45°? Answer: 135°
19.Complementary to 1°? Answer: 89°
20.Supplementary to 179°? Answer: 1°

About This Practice

This practice set includes 20 angle relationship problems. Understanding these relationships is essential for geometry proofs and real-world applications.

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