How to Make a Circle Graph

How to Make a Circle Graph Rudd Middle School Pam Bowman

A circle graph is used to compare parts of a whole. • Information can be shown--such as the results from a poll. • Class surveys could be taken to find out favorite movies or favorite toppings on a pizza.

Class Survey Example survey: Movie A 5 votes Movie B 10 votes Movie C 15 votes

Steps to make a circle graph.1. Add to get the total of your survey. 5 10 +15 30

2. Make a ratio.Target area/Total area Movie A 5 votes 5/30 Movie B 10 votes 10/30 Movie C 15 votes 15/30

3. Divide Ratio Decimal Movie A 5/30 = 5÷30=0.166 Movie B 10/30 =10÷30=0.333 Movie C 15/30 =15÷30=0.500

4. Round to two (2) decimal places. Ratio Decimal 2 places Movie A 5/30 = 0.166 = 0.17 Movie B 10/30 = 0.333 = 0.33 Movie C 15/30 = 0.500 = 0.50

5. Write the percent. Percent Movie A 5/30 = 0.166 = 0.17 = 17% Movie B 10/30 = 0.333 = 0.33 = 33% Movie C 15/30 = 0.500 = 0.50 = 50%

6. Multiply the rounded decimal by 360°. Movie A 0.17 x 360° = 61.2° Movie B 0.33 x 360° = 119° Movie C 0.50 x 360° = 180°

Make a circle graph. • Make a point on your paper. • Draw a circle with a compass. • Draw a radius. • Use a protractor to measure the degrees.

Make a circle graph. 1.. Make a point. 2. Draw a circle. 3. Draw a radius

Make a circle graph. 4. Use a protractor to measure the degrees. Don’t just guess! Then label the parts of the circle.

How to Make a Circle Graph