Types of Angles

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 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 a straight angle?

Back

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

Front

How do you identify an obtuse angle in a diagram?

Back

An obtuse angle appears wider than a right angle and is often labeled with a degree measure greater than 90°.

Front

How do you identify an acute angle in a diagram?

Back

An acute angle appears sharper than a right angle and is often labeled with a degree measure less than 90°.

Front

What is the sum of angles in a triangle?

Back

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

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is the relationship between supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

Can an angle be both acute and obtuse?

Back

No, an angle cannot be both acute and obtuse at the same time.