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 more than 90 degrees but 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 a full angle?

Back

A full angle is an angle that measures exactly 360 degrees.

Front

How can you identify an acute angle?

Back

You can identify an acute angle by measuring it; if it is less than 90 degrees, it is acute.

Front

How can you identify a right angle?

Back

A right angle can be identified using a square corner or a protractor; it measures exactly 90 degrees.

Front

How can you identify an obtuse angle?

Back

An obtuse angle can be identified by measuring it; if it is more than 90 degrees but less than 180 degrees, it is obtuse.

Front

What is the sum of angles in a triangle?

Back

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

Front

What is a complementary angle?

Back

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