Understanding Angles and Their Measures

What is a protractor?

• an angle

• a tool used to measure angles

• a ruler

• a tool to draw a circle

Which is the measurement of an obtuse angle?

• 90

• 20

• 130

• 180

A triangle measures _____________.

• 360 degrees

• 180 degrees

• 530 degrees

• 160 degrees

Illustrate the measure of an angle as the part of a circle whose center is at the vertex of the angle that is "cut out" by the rays of the angle. What is the measure of the following angle?  

• 56 degrees

• 180 degrees

• 142 degrees

• 97 degrees

To construct an angle that has a measure of 125 degrees, another ray can be drawn that starts at point I and passes through--

• Point P

• Point O

• Point Q

• Point R

To construct an angle that has a measure of 85 degrees, another ray can be drawn that starts at point L and passes through--

• Point R

• Point Q

• Point P

• Point N

How many degrees are in the shaded part of this circle?

• 72

• 360

• 75

• 700

What is the measurement of the missing angle?

• 30

• 150

• 100

What is the measure of the angle shown?

• 35 degrees

• 45 degrees

• 145 degrees

• 155 degrees

What is the measurement of the missing angle?

• 60

• 120

• 50