Vertical and Adjacent Angles

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always congruent (equal in measure).

Front

What is the measure of vertical angles?

Back

Vertical angles are always equal in measure.

Front

What are adjacent angles?

Back

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

Front

What do adjacent angles share?

Back

Adjacent angles share a side and a vertex.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

If angle C is 30 degrees, what is the measure of angle D if they are supplementary?

Back

Angle D measures 150 degrees.

Front

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

Back

The sum is always 180 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are congruent, meaning they have the same measure.

Front

If angle 1 is 45 degrees, what is the measure of angle 3 if angle 1 and angle 3 are vertical angles?

Back

Angle 3 also measures 45 degrees.

Front

What is the measure of angle A if it is vertical to angle B which measures 45 degrees?

Back

Angle A also measures 45 degrees.