8-1 to 8-6 Review

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What is an angle?

Back

An angle is formed by two rays with a common endpoint called the vertex.

Front

What is a ray?

Back

A ray is a part of a line that starts at a point and extends infinitely in one direction.

Front

What is a line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is an obtuse angle?

Back

An obtuse angle measures more than 90 degrees but less than 180 degrees.

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is a reflex angle?

Back

A reflex angle measures more than 180 degrees but less than 360 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle 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.