planar Geometry Review

Front

What are two angles that add up to 90 degrees called?

Back

Complementary angles.

Front

What are corresponding angles?

Back

Angles that are in the same position on different parallel lines cut by a transversal.

Front

If m∠1 = 30°, what is m∠3 if they are equal?

Back

m∠3 = 30°.

Front

What is the missing angle if the total is 90° and one angle is 40°?

Back

The missing angle is 50°.

Front

What are two angles that add up to 180 degrees called?

Back

Supplementary angles.

Front

What is a right angle?

Back

An angle that measures exactly 90 degrees.

Front

What is a straight angle?

Back

An angle that measures exactly 180 degrees.

Front

What is the sum of angles in a triangle?

Back

The sum of angles in a triangle is always 180 degrees.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What is a transversal?

Back

A line that crosses at least two other lines.