Geometry: Angles

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is a straight angle?

Back

A straight angle measures 180 degrees.

Front

What is a right angle?

Back

A right angle measures 90 degrees.

Front

What is an acute angle?

Back

An acute angle measures less than 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 a full angle?

Back

A full angle measures 360 degrees.

Front

How many degrees are in a right angle?

Back

90 degrees.

Front

How many degrees are in a straight angle?

Back

180 degrees.

Front

What type of angle is less than 90 degrees?

Back

Acute angle.

Front

What type of angle is exactly 90 degrees?

Back

Right angle.