Practice
Name
16-3
Understanding Angles and
Unit Angles
In 1−3, find the measure of each angle.
1
of the circle.
1. The angle is __
12
2. A circle is divided into 20 equal
parts. What is the angle measure
of three of those parts?
degrees
degrees
4. Reasoning Kurt cut pizzas into
wedges measuring 40 degrees.
If each person eats one piece of
pizza, how many people could he
feed with two whole pizzas?
3. A circle is divided into 9 equal
parts. What is the angle measure
of two of those parts?
degrees
5. Sam cut a pie into equal slices. There are only 3 slices left.
The angle measure for the three slices is 72°. How many
slices did Sam cut the pie into?
6. Writing to Explain A circle is divided into 18 equal parts.
How many degrees is the angle for each part? How many
degrees is the angle for 5 parts? Explain.
7. Brian cut an extra large round pizza into 12 pieces. Seven of
the pieces were eaten. What angle measure of pizza is left?
A 30°
B 120°
C 150°
P 16•3
D 210°
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