Geometry Angle Pairs and Segments Review

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect, and they are always congruent (equal measures).

Front

What is the definition of a bisector in geometry?

Back

A bisector is a line, ray, or segment that divides an angle or segment into two equal parts.

Front

If two angles are supplementary, what is the relationship between their measures?

Back

The sum of their measures is 180°.

Front

If two angles are complementary, what is the relationship between their measures?

Back

The sum of their measures is 90°.

Front

What is the midpoint of a segment?

Back

The midpoint is the point that divides a segment into two equal parts.

Front

How do you find the measure of an angle if you know its supplementary angle?

Back

Subtract the measure of the known angle from 180°.

Front

How do you find the measure of an angle if you know its complementary angle?

Back

Subtract the measure of the known angle from 90°.

Front

Back

x + 15 = 4x - 45.