Vertical & Adjacent 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

Define adjacent angles.

Back

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

Front

What are complementary angles?

Back

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

Front

What are supplementary angles?

Back

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

Front

If one angle measures 70 degrees, what is the measure of its complementary angle?

Back

20 degrees.

Front

If two angles are supplementary and one measures 160 degrees, what is the measure of the other angle?

Back

20 degrees.

Front

Which angles are formed when two lines intersect?

Back

Vertical angles and adjacent angles are formed when two lines intersect.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal to each other.

Front

If ∠A and ∠B are adjacent angles, what can you say about their measures?

Back

Their measures can be any values, but they share a common vertex and side.

Front

What is the sum of the measures of complementary angles?

Back

The sum is always 90 degrees.