Step 2
Step 1
Materials:straightedge, paper, pencil, protractor, compass
Copy the table above onto your own paper.
Make Circle Graphs
12-12
Hakan surveyed the students in his class to find the
number of television sets in each home. You can help
Hakan make a circle graph to display his results.
Complete the Percent of Total column in Hakan’s table
by solving proportions.
Find what percentof the total number of homes, 30, is
represented by 6 homes.
part part (%)
3
6
0
1
n
00
whole whole (%)
6 100 30 n
600 30 30 n 30
20 n
So
3
6
0
1
n
00
20%
Does the Percent of Total column add up to 100%?
If not, check your work with a calculator.
Number of Number Percent Angle
TVs Per Home of Homes of Total Measure
1 6 20% 72
2 12??
3 9??
4 or more 3??
Totals 30 100% 360
In a circle graph, the whole
represents 100%or 360°.
1.3
8206-2_436-437 10/7/07 12:16 PM Page 436