Angles Review

Front

What are supplementary angles?

Back

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

Front

If ∠C and ∠D are supplementary and ∠D measures 45°, what is the measure of ∠C?

Back

135°

Front

What are vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect. They are always equal.

Front

Name the vertical angle to ∠h.

Back

∠f

Front

How many degrees are in a circle?

Back

360 degrees.

Front

What are complementary angles?

Back

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

Front

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

Back

60°

Front

What is the sum of the interior angles of a triangle?

Back

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

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

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