Complementary, Supplementary, Vertical, Adjacent Angles

Front

What is the vertex of an angle?

Back

The vertex of an angle is the point where the two rays meet.

Front

What type of angle measures less than 90 degrees?

Back

Acute angle.

Front

What type of angle measures exactly 90 degrees?

Back

Right angle.

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

Obtuse angle.

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always equal.

Front

What are adjacent angles?

Back

Angles that share a common side and a common vertex but do not overlap.

Front

If ∠A and ∠B are complementary, and ∠A measures 30 degrees, what is the measure of ∠B?

Back

60 degrees.

Front

If two angles are supplementary and one angle measures 110 degrees, what is the measure of the other angle?

Back

70 degrees.