Vertical Angles and Linear Pairs

Front

What are vertical angles?

Back

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

Front

What is a linear pair of angles?

Back

A linear pair of angles are two adjacent angles that form a straight line. Their measures add up to 180 degrees.

Front

If two angles are vertical angles, what can we say about their measures?

Back

The measures of vertical angles are equal.

Front

If two angles form a linear pair, what is the relationship between their measures?

Back

The measures of angles in a linear pair add up to 180 degrees.

Front

Find the missing angle if one angle is 70 degrees in a linear pair.

Back

The missing angle is 110 degrees.

Front

If angle A is 35 degrees and angle B is a vertical angle to angle A, what is the measure of angle B?

Back

Angle B is also 35 degrees.

Front

What is the sum of the measures of two angles that are a linear pair?

Back

The sum is 180 degrees.

Front

If angle X is 16 degrees, what is the measure of its vertical angle?

Back

The vertical angle is also 16 degrees.

Front

If angle C is 72 degrees, what is the measure of the angle that forms a linear pair with angle C?

Back

The angle that forms a linear pair with angle C is 108 degrees.

Front

What is the value of x if angle 1 is 20 degrees and angle 2 is a vertical angle to angle 1?

Back

x = 20 degrees.