6th Grade Math Textbook, Progress

Step 3 Complete the Angle Measure column in Hakan’s table.

Since there are 360° in a circle, multiply each of the

percents by 360° to find the degrees in each section of

the circle graph. Find the number of degrees that 20%

(homes with 1 TV) represents.

Let d
number of degrees.

20% of 360
d

^15  360 
d

72 
d

Does the Angle Measure column add up to 360?

If not, check your work.

Step 4 Use your compass to draw a large

circle. Draw radius P
A
of the circle.

Step 5 Place the center mark of your

protractor on Pand draw a

central angle of 72, as shown.

Step 6 Draw the other central angles.

Use the degrees in Step 3. Start

your next angle using radius P
B
.

Step 7 Label each section of the graph with 1 TV,

2 TVs, and so on. Give your graph a title.

Think

One angle of the circle

graph should be 72°.

708090

60

50

40

30

20

10

0

(^100110)
120
130
140
150
160
170
180
(^908070)
(^6050)
40
30
20
10
0
110100
120
130
140
150
160
170
180
A
B
P

1. Change the number of homes in your table, in order,
   from 6, 12, 9, 3 to 9, 30, 6, 15. Discuss with your class
   and then draw a circle graph for the new data.


2. Carl had 3 hours of homework last weekend. He spent the following
   amount of time on each subject: math, 30 min; science, 60 min;
   spelling, 15 min; social studies, 45 min; English, 30 min.
   Construct a circle graph and discuss the results with your class.

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