Identify Angles: Right, Acute, & Obtuse

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 greater than 90 degrees but less than 180 degrees.

Front

What is a right angle?

Back

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

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

How can you identify an acute angle?

Back

An acute angle can be identified as it is smaller than a right angle (90 degrees).

Front

How can you identify an obtuse angle?

Back

An obtuse angle can be identified as it is larger than a right angle (90 degrees) but smaller than a straight angle (180 degrees).

Front

How can you identify a right angle?

Back

A right angle can be identified by its measurement of exactly 90 degrees.

Front

What is the sum of angles in a triangle?

Back

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

Front

If one angle in a triangle is 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

What type of angle is 45 degrees?

Back

45 degrees is an acute angle.