Complementary, Supplementary, Vertical, Adjacent Angles

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always equal.

Front

What are adjacent angles?

Back

Two angles that share a common side and a common vertex.

Front

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

Back

60° (90° - 30° = 60°).

Front

If angle B is 120°, what is the measure of its supplementary angle?

Back

60° (180° - 120° = 60°).

Front

If two angles are complementary and one angle measures 40°, what is the measure of the other angle?

Back

50° (90° - 40° = 50°).

Front

If two angles are supplementary and one angle measures 75°, what is the measure of the other angle?

Back

105° (180° - 75° = 105°).

Front

What is the relationship between two angles that measure 45° and 45°?

Back

They are complementary angles.

Front

What is the relationship between two angles that measure 110° and 70°?

Back

They are supplementary angles.