measuring angles

Front

What is an angle?

Back

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

Front

What is the unit of measurement for angles?

Back

Angles are measured in degrees.

Tags

CCSS.4.MD.C.6

Front

What is a protractor?

Back

A protractor is a tool used to measure angles in degrees.

Tags

CCSS.4.MD.C.6

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is an obtuse angle?

Back

An obtuse angle 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 measures exactly 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is a full rotation in degrees?

Back

A full rotation is 360 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

How do you measure an angle with a protractor?

Back

Align the protractor's center point with the angle's vertex and read the measurement where the ray intersects the protractor.

Tags

CCSS.4.MD.C.6

Front

What is the measure of a right angle?

Back

90 degrees.

Tags

CCSS.4.G.A.1