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 measure of a right angle?

Back

A right angle measures 90 degrees.

Tags

CCSS.4.G.A.1

Front

What is the measure of a straight angle?

Back

A straight angle measures 180 degrees.

Tags

CCSS.4.G.A.1

Front

What is the total number of degrees in a circle?

Back

There are 360 degrees in a circle.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

What do we call an angle that measures less than 90 degrees?

Back

An acute angle.

Tags

CCSS.4.G.A.1

Front

What do we call an angle that measures exactly 90 degrees?

Back

A right angle.

Tags

CCSS.4.G.A.1

Front

What do we call an angle that measures more than 90 degrees but less than 180 degrees?

Back

An obtuse angle.

Tags

CCSS.4.G.A.1

Front

What is the measure of a full rotation?

Back

A full rotation measures 360 degrees.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

If ∠BAD = 110°, what is the measure of ∠CAD if they are supplementary?

Back

∠CAD = 70° (because 110° + 70° = 180°).

Tags

CCSS.7.G.B.5

Front

What is the measure of ∠FOE if it is given as 20 degrees?

Back

∠FOE = 20°.

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1