Special Angle Pairs Vocab

Front

What is an adjacent angle?

Back

An adjacent angle is an angle that shares a common side and vertex with another angle.

Front

What does it mean for two angles to be supplementary?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.

Front

What are complementary angles?

Back

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

Front

What is a linear pair of angles?

Back

A linear pair of angles consists of two adjacent angles that form a straight line, summing to 180 degrees.

Front

What is the value of x if angle 5 is 70 degrees and angle 1 is supplementary to angle 5?

Back

x = 110 degrees.

Front

If angle A is 30 degrees, what is the measure of its complementary angle?

Back

The complementary angle is 60 degrees.

Front

What is the relationship between angle 4 and angle 5 if they are a linear pair?

Back

Angle 4 and angle 5 are supplementary and their measures add up to 180 degrees.

Front

If two angles are complementary and one angle measures 40 degrees, what is the measure of the other angle?

Back

The other angle measures 50 degrees.

Front

What is the definition of vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect, and they are always equal.

Front

If angle 3 is 45 degrees, what is the measure of its vertical angle?

Back

The vertical angle is also 45 degrees.