Acute, Obtuse, Right, Straight Angles

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 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 visually?

Back

An acute angle appears sharp and is smaller than a right angle.

Front

How can you identify an obtuse angle visually?

Back

An obtuse angle appears wider and is larger than a right angle.

Front

What is the sum of angles in a triangle?

Back

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

Front

If an angle measures 45 degrees, what type of angle is it?

Back

It is an acute angle.

Front

If an angle measures 120 degrees, what type of angle is it?

Back

It is an obtuse angle.

Front

What type of angle is formed by the hands of a clock at 3:00?

Back

A right angle.