Angle Pair Relationships

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

Name a pair of adjacent angles.

Back

Angles 7 and 10.

Front

What are vertical angles?

Back

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

Front

Name a pair of vertical angles.

Back

Angles 7 and 9.

Front

What is a linear pair of angles?

Back

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

Front

Name a pair of angles that form a linear pair.

Back

Angles 9 and 10.

Front

What is the sum of angles in a linear pair?

Back

The sum of angles in a linear pair is always 180 degrees.

Front

If angle A and angle B form a linear pair and angle A is 63 degrees, what is angle B?

Back

Angle B is 117 degrees.

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose sum is 90 degrees.

Front

Give an example of complementary angles.

Back

Angles of 30 degrees and 60 degrees are complementary.