Online College Courses for Credit

FREE EDUCATIONAL RESOURCES PROVIDED by SOPHIA

Are you a student?
Free Professional Development
• > Video Ten: Constructing Circle Graph: Part 1
+

Video Ten: Constructing Circle Graph: Part 1

Rating:
(4)
• (2)
• (0)
• (1)
• (1)
• (0)
Author: Shelly Hicks

Developing Effective Teams

*No strings attached. This college course is 100% free and is worth 1 semester credit.

29 Sophia partners guarantee credit transfer.

310 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 27 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial

Drawing Circle Graphs

Key Ideas:

Circle graph - shows how the parts of a set of data compare with the whole set of data

Here is an example to work through and try!!

To draw a circle graph:

Step 1:  Create a table like the one below (if it is not already given to you).

Step 2: Write each number as a fraction of the sum of the numbers in the data

• 20 out of 100 people like Red so this fraction would be
• Blue the fraction is
• Green the fraction is

Step 3: Write each fraction as a percent (this is easy for this example since the denominator is already 100)

• Red is 20%
• Blue is 45%
• Green is 35%

Step 4: Write each fraction as a decimal, then multiply by 360o to find the size of each angle needed for the sectors

• Size of angle for Red is 0.20 x 360o = 72o
• Size of angle for Blue is 0.45 x 360o = 162o
• Size of angle for Green is 0.35 x 360o = 1260

Step 5: Use your protractor to draw the angles in a circle like the one below.  You can either draw your own circle or your teacher can provide you with a copy of it.  Start by drawing the radius of this circle.  Try it on your own!  If you need help see your teacher the next class.

NOTE: GO BACK TO REVIEW HOW TO USE A PROTRACTOR AT THE BEGINNING OF THIS UNIT (VIDEO 1)