Measuring Angles

Front

What is an angle?

Back

An angle is formed by two rays (sides) that meet at a common endpoint called the vertex.

Front

What is the vertex of an angle?

Back

The vertex is the point where two lines or rays meet to form an angle.

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

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 straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

What is a full angle?

Back

A full angle measures exactly 360 degrees.

Front

How do you measure an angle?

Back

An angle is measured in degrees using a protractor.

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 are complementary angles?

Back

Complementary angles are two angles that add up to 90 degrees.