supplementary, complementary, and vertical angles.

Front

What are supplementary angles?

Back

Two angles whose measures add up to 180 degrees.

Front

What are complementary angles?

Back

Two angles whose measures add up to 90 degrees.

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 70°, what is the measure of its supplementary angle?

Back

110° (180° - 70° = 110°).

Front

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

Back

60° (90° - 30° = 60°).

Front

What is the relationship between adjacent angles?

Back

Adjacent angles share a common side and a common vertex.

Front

If two angles are complementary, what is the sum of their measures?

Back

90 degrees.

Front

If two angles are supplementary, what is the sum of their measures?

Back

180 degrees.

Front

If angle C is 45°, what are the measures of its complementary and supplementary angles?

Back

Complementary: 45°; Supplementary: 135°.

Front

What is the equation for finding the measure of an angle if it is supplementary to 110°?

Back

x + 110 = 180.