Geometry Unit 1: Angle and Segment Addtion

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal in measure.

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90°.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180°.

Front

What is the Segment Addition Postulate?

Back

Front

If angle 1 is 135 degrees, what is the measure of angle 3 if they are vertical angles?

Back

Angle 3 is also 135 degrees.

Front

If angle A is 25 degrees, what is the measure of its complement?

Back

The complement of angle A is 65 degrees, since 90° - 25° = 65°.

Front

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

Back

The other angle measures 135 degrees, since 180° - 45° = 135°.

Front

What is the Angle Addition Postulate?

Back

Front

What are adjacent angles?

Back

Adjacent angles are two angles that share a common side and a common vertex but do not overlap.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always equal in measure.