Angles (classify and measure)

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What are the three main types of angles?

Back

The three main types of angles are acute (less than 90 degrees), right (exactly 90 degrees), and obtuse (greater than 90 degrees but less than 180 degrees).

Tags

CCSS.4.G.A.1

Front

What tool is used to measure angles?

Back

A protractor is used to measure angles.

Tags

CCSS.4.MD.C.6

Front

What is an acute angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is a right angle?

Back

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

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is a straight angle?

Back

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

Tags

CCSS.4.G.A.1

Front

How do you classify an angle that measures 45 degrees?

Back

An angle that measures 45 degrees is classified as an acute angle.

Tags

CCSS.4.G.A.1

Front

How do you classify an angle that measures 120 degrees?

Back

An angle that measures 120 degrees is classified as an obtuse angle.

Tags

CCSS.4.G.A.1

Front

What is the measure of a full rotation in degrees?

Back

A full rotation measures 360 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1