Angles, Angles, Everywhere

Front

What is an angle?

Back

An angle is formed when two rays meet at a common endpoint.

Front

What do we call the point where two rays meet?

Back

The point where two rays meet is called the vertex.

Front

What are the two parts that make up an angle?

Back

An angle is made up of two rays.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures 180 degrees.

Front

What is an acute angle?

Back

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

Front

What is an obtuse angle?

Back

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

Front

What do we call angles that add up to 90 degrees?

Back

Angles that add up to 90 degrees are called complementary angles.

Front

What do we call angles that add up to 180 degrees?

Back

Angles that add up to 180 degrees are called supplementary angles.

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.