Types of Angles

Front

What is an acute angle?

Back

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

Front

What is a right angle?

Back

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

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures greater than 90 degrees and less than 180 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that 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.

Front

How do you identify an acute angle visually?

Back

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

Front

How do you identify a right angle visually?

Back

A right angle forms a perfect corner, like the corner of a square.

Front

How do you identify an obtuse angle visually?

Back

An obtuse angle looks wider than a right angle and is larger than 90 degrees.

Front

How do you identify a straight angle visually?

Back

A straight angle looks like a straight line and measures exactly 180 degrees.

Front

What is the measurement of a full rotation in degrees?

Back

A full rotation measures 360 degrees.