Complementary, Supplementary, Adjacent, Vertical 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 adjacent angles?

Back

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

Front

What are vertical angles?

Back

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

Front

If angle A is 30°, what is its complementary angle?

Back

60° (90° - 30° = 60°).

Front

If angle B is 120°, what is its supplementary angle?

Back

60° (180° - 120° = 60°).

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

If two angles are supplementary and one angle measures 110°, what is the measure of the other angle?

Back

70° (180° - 110° = 70°).

Front

If angle 1 and angle 2 are adjacent and angle 1 measures 45°, what is the measure of angle 2 if they are complementary?

Back

45° (90° - 45° = 45°).

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal.