Understanding Protractors and Angles

What is the purpose of a protractor?

• To draw circles

• To measure angles

• To measure length

• To draw straight lines

How many degrees are there in total on a protractor?

• 270 degrees

• 90 degrees

• 360 degrees

• 180 degrees

What is the first step in measuring an angle with a protractor?

• Rotate the protractor to fit the angle

• Read the scale where the other arm crosses

• Place the center of the protractor on the vertex

• Align the baseline with one arm of the angle

Which type of angle measures exactly 90 degrees?

• Obtuse angle

• Acute angle

• Right angle

• Straight angle

What is the measure of a straight angle?

• 360 degrees

• 270 degrees

• 180 degrees

• 90 degrees