1. Circle Graphs Use the circle graph below.
COURSE 2 LESSON 7-9
Circle Graphs
Use the circle graph below.
a. What percent of the days were snowy?
13%
b. How many days were cloudy?
27% of 30 days = 0.27 • 30 = 8.1
8 days were cloudy.
7-9

2. Circle Graphs Use the information in the table to make a circle graph.
COURSE 2 LESSON 7-9
Circle Graphs
Use the information in the table to make a circle graph.
Size of U.S. Households (2000)
No. of People in Household
Number
(in thousands) 1 2 3 4
5 or more
26,724
34,666
17,152
15,309
10,854
Step 1 Add to find the total number of households.
26, , , , , ,705 (in thousands)
7-9

3. Circle Graphs (continued)
COURSE 2 LESSON 7-9
Circle Graphs
(continued)
Step 2 For each central angle, set up a proportion to find the angle measure. Use a calculator to solve.
15,309
104,705 d
360
10,854 f
26,724 a =
34,666 b
17,152 c
a °
b °
c °
d °
f °
Step 3 Draw a circle. Draw the central angles using the degrees found in Step 2. Label each section. Add a title. Add a key if necessary.
7-9

4. COURSE 2 LESSON 7-9
Circle Graphs
The circle graph shows how a class of 48 students spends free time
after lunch.
1. What percent study or do
extracurricular activities?
2. How many students spend
time on extracurricular activities?
3. Find the measure of the central angle that you would draw to represent
15% in a circle graph.
39% 12
54º
7-9