Classify 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 the sum of angles in a triangle?

Back

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

Front

What type of angle is formed by two rays that point in opposite directions?

Back

A straight angle, which measures exactly 180 degrees.

Front

What is the relationship between acute angles and right angles?

Back

Acute angles are always less than right angles.

Front

What is the relationship between obtuse angles and right angles?

Back

Obtuse angles are always greater than right angles.

Front

Can an angle be both acute and obtuse?

Back

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

Front

What is a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.

Front

What is the complementary angle of a 30-degree angle?

Back

The complementary angle of a 30-degree angle is a 60-degree angle.