Unit 3 Angle Pairs

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 adjacent angles?

Back

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

Front

What is a linear pair of angles?

Back

A linear pair of angles consists of two adjacent angles whose non-common sides form a straight line. They are supplementary.

Front

What are complementary angles?

Back

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

Front

What are supplementary angles?

Back

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

Front

If angle 2 is 30 degrees, what is the measure of its complement?

Back

The complement of angle 2 is 60 degrees, since 90 - 30 = 60.

Front

If angle 1 is 120 degrees, what is the measure of its supplement?

Back

The supplement of angle 1 is 60 degrees, since 180 - 120 = 60.

Front

Identify the vertical angles if angle 3 is 45 degrees.

Back

The vertical angles to angle 3 are equal to 45 degrees.

Front

What is the relationship between adjacent angles in a linear pair?

Back

Adjacent angles in a linear pair are supplementary, meaning their measures add up to 180 degrees.

Front

Which angles are vertical to angle 4?

Back

The angles vertical to angle 4 are the angles that are opposite to it when two lines intersect.