Measuring Angles Using a Protractor

Front

What kind of angle is this? Options: obtuse, right, straight, acute

Back

acute

Tags

CCSS.4.G.A.1

Front

Why is this not a 85° angle?

Back

85° is an acute angle. This picture shows an obtuse angle as it is more than 90°.

Tags

CCSS.4.G.A.1

Front

Is this the correct way of using a protractor to measure an angle?

Back

No, because the baseline of the protractor is not aligned properly with the bottom ray of the angle.

Tags

CCSS.4.MD.C.6

Front

This is the wrong way of using a protractor because __________.

Back

the vertex of the angle is not aligned to the center point of the protractor.

Tags

CCSS.4.MD.C.6

Front

Do you agree that ∠a = 90°?

Back

No. The measurement is not accurate because the bottom line of the angle is not aligned to the baseline of the protractor.

Tags

CCSS.4.MD.C.6

Front

Measure of the angle? Options: 21 degrees, 34 degrees, 70 degrees, 172 degrees.

Back

21 degrees

Tags

CCSS.4.MD.C.6

Front

What is the measure of the angle? Options: 110 degrees, 140 degrees, 150 degrees, 170 degrees.

Back

170 degrees

Tags

CCSS.4.MD.C.6

Front

The amount of the angle above is . . . .
Options: 60^o, 80^o, 120^o, 140^o

Back

120^o

Tags

CCSS.4.MD.C.6

Front

Find the angle above: 130^o, 120^o, 90^o, 50^o

Back

50^o

Tags

CCSS.4.MD.C.6

Front

What kind of angle is this? Options: right, acute, obtuse, straight

Back

obtuse

Tags

CCSS.4.G.A.1