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

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

Back

The measures of vertical angles are equal.

Front

What is the measure of angle r if it is a vertical angle to an angle measuring 43 degrees?

Back

r = 43 degrees.

Front

What type of angle is greater than 90 degrees but less than 180 degrees?

Back

Obtuse angle.

Front

If angle ABC measures 152 degrees and is bisected by line BD, what is the measure of angle ABD?

Back

m∠ABD = 76 degrees.

Front

How do you find the missing angle when two angles are supplementary?

Back

To find the missing angle, subtract the known angle from 180 degrees.

Front

What is the measure of the missing angle if one angle is 152 degrees?

Back

The missing angle is 28 degrees.

Front

What is the sum of the measures of angles on a straight line?

Back

The sum of the measures of angles on a straight line is 180 degrees.

Front

If angle x is 20 degrees, what is the measure of its vertical angle?

Back

The vertical angle is also 20 degrees.

Front

What is the relationship between complementary angles?

Back

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