Angle Relationships

Front

What are vertical angles?

Back

Vertical angles are angles that are opposite each other when two lines intersect. They are equal in measure.

Front

What is the measure of angle D if angle C is 30 degrees and they are supplementary?

Back

Angle D measures 150 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are always equal in measure.

Front

What do we call angles that add up to 180 degrees?

Back

Supplementary angles.

Front

What do we call angles that add up to 90 degrees?

Back

Complementary angles.

Front

If two angles are adjacent, what does that mean?

Back

Adjacent angles share a common vertex and a common side but do not overlap.

Front

If one vertical angle measures 55 degrees, what is the measure of the other vertical angle?

Back

The other vertical angle also measures 55 degrees.

Front

What is the term for angles that are formed when two lines intersect?

Back

The angles formed are called vertical angles and adjacent angles.

Front

If angle 2 is 40 degrees, what is the measure of the angle that is vertical to it?

Back

The angle that is vertical to angle 2 also measures 40 degrees.

Front

What is the sum of the measures of two supplementary angles?

Back

The sum is always 180 degrees.