Angle Relationships

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

Identify the relationship: If two angles are vertical angles, what can be said about their measures?

Back

Vertical angles are equal in measure.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

Back

Front

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

Back

Two angles are supplementary if their measures add up to 180 degrees. To find the missing angle, subtract the known angle from 180 degrees.

Front

Back

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.