Linear Pairs and Vertical Angles

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

Which angles form a linear pair?

Back

A linear pair consists of two adjacent angles whose non-common sides form a straight line. The measures of angles in a linear pair add up to 180 degrees.

Front

What is the sum of the measures of angles in a linear pair?

Back

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

Front

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

Back

If two angles are vertical angles, their measures are equal.

Front

If angle A measures 12 degrees, what is the measure of its vertical angle?

Back

The measure of the vertical angle is also 12 degrees.

Front

If angle A and angle B form a linear pair and angle A measures 70 degrees, what is the measure of angle B?

Back

Angle B measures 110 degrees (180 - 70 = 110).

Front

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

Back

Adjacent angles in a linear pair share a common vertex and a common side, and their non-common sides form a straight line.

Front

How do you find the value of x in a linear pair problem?

Back

Set up the equation x + y = 180, where x and y are the measures of the two angles in the linear pair.

Front

What is the measure of each angle in a pair of vertical angles?

Back

Each angle in a pair of vertical angles is equal in measure.

Front

If angle COB is 104 degrees, what is the measure of angle AOD if they are vertical angles?

Back

Angle AOD also measures 104 degrees.