1. Circle Graphs
A graph made of a circle divided into sectors. Also called pie graph.
GLE SPI

2. Parts of a Circle Graph
Graph Title – the title tells what the graph is representing.
Sectors – Each sector is one part of the whole circle.
Sector Labels – Each label tells what the sector represents.
The Perfect Pizza
55% cheese
15% sauce
30% pepperoni

3. How to make a circle graph
Using a compass, draw a circle large enough to show all of your data.
Determine how many sectors you will need in your graph. You will need to know the percentages of the whole of your data. Try to make the sector sizes look as close to the percentage of the circle as the percentage of your data.
Label each sector and give your graph a title.

4. Activity Example Pizza 10 Chicken 8 Spaghetti 5 Fish 2
Survey your classroom for cafeteria favorites. Choose four different lunches and gather the data. Make a table to show data.
Pizza 10
Chicken 8
Spaghetti 5
Fish 2

5. You must now change the numbers to percentages
You must now change the numbers to percentages. To do this, change each number to a fraction.
10/ / / /25
Then divide the numerator by the denominator.
10/25= /25= /25= /25=.08
Then multiply the answer by 100
.40*100=40%
.32*100=32%
.20*100=20%
.08*100=8%
Now you are ready to draw your circle graph.

6. First you will need to divide your circle into approximate sectors to represent each percentage. Label each sector with the appropriate name and percentage.
Chicken 32%
Pizza 40%
Spaghetti 20%
Fish 8%

7. Finally, give your graph a title.
Favorite Lunch Foods
Chicken 32%
Pizza 40%
Spaghetti 20%
Fish 8%

8. Make Your Own Circle Graph
Data to be graphed,
Title area & legend area,
Labels for the X axis & Y axis, and
An appropriate graph for the data.

9. Graph #4: Circle Graph - a graph in the shape of a circle that shows fractions, percents, or parts of a whole.
Mr. Smith’s fourth grade took a poll about their favorite fast food. There were 4 categories.
Use the data in the table to make a Circle Graph. You may have to change the numbers to fractions.

10. The NEXT slide has the ANSWER….
DON’T SHOW YET!

11. Does your graph look like this one? If not, draw this one.
12 people=12/24=1/2
6 people=6/24=1/4
4 people=4/24=1/3
2 people=2/24=1/12

12. Additional Resources