Finding Missing Angles

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

If angle A is 30°, what is the measure of its complementary angle?

Back

60°.

Front

If angle B is 110°, what is the measure of its supplementary angle?

Back

70°.

Front

Solve for x: 90° - x = 45°

Back

x = 45°.

Front

Solve for x: x + 25° = 90°

Back

x = 65°.

Front

Solve for x: x + 50° = 180°

Back

x = 130°.

Front

If two angles are complementary and one angle is 25°, what is the other angle?

Back

65°.

Front

If two angles are supplementary and one angle is 120°, what is the other angle?

Back

60°.

Front

What is the sum of the measures of two complementary angles?

Back

90°.