1. A circle graph represents data as a part of a whole using a circle.
A circle graph is sometimes called a pie chart.
A circle measures ________ degrees and represents ________ percent.
360
100
A central angle has the center of a circle for its vertex the rays are radii of the circle

2. 92 people liked cherry pie.
If 400 people were surveyed, how many people like cherry pie?
Percentage Proportion
part = %
whole x
___
___ 23 =
400
100
x = 92
92 people liked cherry pie.

3. part = % whole 100 x ___ ___ 8 = 400 100 x = 32
If 400 people were surveyed, how many people like pecan pie?
Percentage Proportion
part = %
whole x
___
___ 8 =
400
100
x = 32
32 people liked pecan pie.

4. 25 students play the violin.
(2007)
part = %
whole 15
___
___ x = 60
100
x = 25
25 students play the violin.

5. (2008)

6. Step 2 - Calculate the percent by multiplying the decimal by 100.
Complete the table to show the data. Round to the nearest whole number. Then make a circle graph to represent the data.
Step 1 - Calculate the decimal by dividing the number of each category by the total.
Step 2 - Calculate the percent by multiplying the decimal by 100.
Check to make sure the percents total 100% .
Step 3 - Calculate the central angle by multiplying the decimal by 360 ο.
Check to make sure the degrees total 360 ο.
Division of Crops
CROP
AREA (ACRES)
DECIMAL
PERCENT
CENTRAL ANGLE
Corn
Soybeans
Fallow
Mixed Vegetables
Wheat 70 40 50 10 30
70/200=0.35
40/200=0.2
50/200=0.25
10/200=0.05
30/200=0.15
35%
20%
25% 5%
15%
0.35 x 360ο = x 360ο = 72ο
0.2 x 360ο = 90ο
0.05 x 360ο = 18ο
0.15 x 360ο = 54ο
200
TOTAL
100%
360 ο

7. Step 4 - Construct a circle graph for this data
Step 4 - Construct a circle graph for this data. Label each sector with a name and percent.
Division of Crops
CROP
PERCENT
CENTRAL ANGLE
Corn
35%
126ο
Soybeans
20%
72ο
Fallow
25%
90ο
Mixed Vegetables 5%
18ο
Wheat
15%
54ο
Corn 35%

8. Step 4 - Construct a circle graph for this data
Step 4 - Construct a circle graph for this data. Label each sector with a name and percent.
Division of Crops
CROP
PERCENT
CENTRAL ANGLE
Corn
35%
126ο
Soybeans
20%
72ο
Fallow
25%
90ο
Mixed Vegetables 5%
18ο
Wheat
15%
54ο
Corn 35%
Soybeans 20%

9. Step 4 - Construct a circle graph for this data
Step 4 - Construct a circle graph for this data. Label each sector with a name and percent.
Division of Crops
CROP
PERCENT
CENTRAL ANGLE
Corn
35%
126ο
Soybeans
20%
72ο
Fallow
25%
90ο
Mixed Vegetables 5%
18ο
Wheat
15%
54ο
Corn 35%
Soybeans 20%
Fallow 25%

10. Step 4 - Construct a circle graph for this data
Step 4 - Construct a circle graph for this data. Label each sector with a name and percent.
Division of Crops
CROP
PERCENT
CENTRAL ANGLE
Corn
35%
126ο
Soybeans
20%
72ο
Fallow
25%
90ο
Mixed Vegetables 5%
18ο
Wheat
15%
54ο
Corn 35%
Soybeans 20%
Fallow 25%
\ Mixed Veg. 5%

11. Step 5 - Title the graph. Label each sector with a name and percent.
Step 4 - Construct a circle graph for the data. Label each sector with a name and percent.
Step 5 - Title the graph. Label each sector with a name and percent.
Division of Crops
Division of Crops
CROP
PERCENT
CENTRAL ANGLE
Corn
35%
126ο
Soybeans
20%
72ο
Fallow
25%
90ο
Mixed Vegetables 5%
18ο
Wheat
15%
54ο
Corn 35%
Soybeans 20%
Wheat 15%
Fallow 25%
\ Mixed Veg. 5%

12. Favorite Ice Cream Flavors Ice Cream Flavor Number of Classmates 2)
The table below shows the favorite ice cream flavors of Alexis' 25 classmates.
Using your protractor, create a circle graph to display this data.
Favorite Ice Cream Flavors
Ice Cream Flavor
Number of Classmates
DECIMAL
PERCENT
CENTRAL ANGLE
Vanilla 4
Chocolate 10
Mint 6
Strawberry 5
4/25=0.16
10/25=0.4
6/25= 0.24
5/25 = 0.2
16%
40%
24%
20%
0.16 x 360 ο = 57.6 ο
0.4 x 360 ο = 144 ο
0.24 x 360 ο = 86.4 ο
.2 x 360 ο = 72 ο
100%
360 ο
TOTAL 25
Be sure to
·title your circle graph
·label each section of your circle graph

13. Favorite Ice Cream Flavors Ice Cream Flavor PERCENT CENTRAL ANGLE 2)
The table below shows the favorite ice cream flavors of Alexis' 25 classmates.
Using your protractor, create a circle graph to display this data.
FAVORITE ICE CREAM FLAVORS
Favorite Ice Cream Flavors
Ice Cream Flavor
PERCENT
CENTRAL ANGLE
Vanilla
16%
57.6 ο
Chocolate
40%
144 ο
Mint
24%
86.4 ο
Strawberry
20%
72 ο
Strawberry
20%
Vanilla
16%
Mint
24%
Chocolate
40%
Be sure to
·title your circle graph
·label each section of your circle graph

14. 3) Central Angle .15 x 360 = 54o .20 x 360 = 72o .55 x 360 = 198o
(2006)
Other
expenses
10%
Central Angle
.15 x 360 = 54o
.20 x 360 = 72o
.55 x 360 = 198o
.10 x 360=36o
Supplies
20%
Newsletter
15%
Special
Activities
55%

15. NOTEBOOK COLORS Blue 50% Green Yellow 10% 25% Red 15% 4)
(2008)
NOTEBOOK COLORS 1)
Blue
50%
90/360 = .25 = 25%
Green
10%
Yellow
25%
54/360 = .15 = 15%
Red
15%
36/360 = .1 = 10%
TOTAL = 100% 2)

16. 5)
Parker collected 50 butterflies for his collection last year. The butterflies were of four types. The table below shows how many of each type he collected. Using your protractor, create a circle graph to display this data.
Butterflies Collected
Butterflies Collected
Type of Butterfly
Number of Classmates
Monarch 20
Red Admiral 11
Painted Lady 3
Viceroy 16
Percent
40%
22% 6%
32%
Degrees
144
79.2
21.6
115.2
Monarch 40 %
Red Admiral 22 %
Viceroy 32 % |
Painted Lady 6 %
Be sure to
·title your circle graph
·label each section of your circle graph