Angles - Complementary, Supplementary, Adjacent, Vertical

Front

What are complementary angles?

Back

Two angles whose measures add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles whose measures 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 measures 30 degrees, what is the measure of its complementary angle?

Back

60 degrees.

Front

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

Back

60 degrees.

Front

In a right triangle, what is the measure of the two non-right angles?

Back

They are complementary angles.

Front

If two angles are adjacent and one measures 45 degrees, what is the maximum measure of the other angle if they are supplementary?

Back

135 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.

Front

If angle C is 70 degrees, what is the measure of angle D if they are complementary?

Back

20 degrees.