A pie diagram presents data in the form of a circle partitioned into slices corresponding to different categories. Each category's slice represents its percentage of the total by taking up the appropriate number of degrees out of the full circle's 360 degrees. For example, a pie diagram could show that of 50 students, 5 (10%) were group A, 20 (40%) were group B, 10 (20%) were group AB, and 15 (30%) were group O.

1. PIE DIAGRAM
1. In pie diagram, the data are presented in the form of a circle.
2. Pie diagram is also called a circle diagram.
3. The total area of a circle is 360o. So the data is converted into degrees. Accordingly the
circle is partitioned. As the data is drawn as per angles (degrees), pie diagram is also
called angular diagram.
4. The partitions are given different colors.
5. It is an area diagram. It is a two dimensional diagram.
6. The values are added to get the total.
7. Then each value is converted into degrees.
8. This is done by dividing each value by the total and multiplying it by 360 (360 is the total
degree of a circle).
9. A circle is drawn. The degree for each value is measured with a protractor.
10. Usually, the value with the highest degree is marked at 12’O clock position on the circle.
Other values are marked in the descending order in the clockwise direction.
Group Students
A 5
B 20
AB 10
O 15
Total 50
Blood group of 50 students given in degrees:
Group Students Degrees
A 5 5/50 x 360 = 36o
B 20 20/50 x 360 = 144o
AB 10 10/50 x 360 = 72o
O 15 15/50 x 360 = 108o
Total 50 360o

2. 10%
40%
20%
30%
Bloodgroupofstudents
A B AB O