A pie diagram, or sector diagram, is used to compare components of a whole. The total angle of the circle is 360 degrees, representing the total quantity. Each component's proportion is calculated by dividing its value by the total and multiplying by 360, determining the angle of its sector slice in the circle. The document provides an example pie diagram depicting expenditures on food, clothing, rent, education, and miscellaneous items based on their values and percentages of a total budget.

2. Pie Diagram or Sector Diagram:
It is a popular diagram and is drawn when the components are to be shown for
comparison. The total angle of the circle is 360o
and the total quantity to be
represented is taken equal to 360o
. The angle for each component are calculated
and these angles are made in the circle to show different components.
Example–13:
Draw a Pie diagram for the following table.
Items Expenditure
Food 2300
Clothing 1000
House Rent 1200
Education 900
Miscellaneous 600
Solution:
Items Expenditure = f Angles of a sub-sectors =
𝑓×360
∑𝑓
Food 2300
Clothing 1000
House Rent 1200
Education 900
Miscellaneous 600
∑𝑓 = 6000


138
6000
3602300
=



60
6000
3601000
=



72
6000
3601200
=



54
6000
360900
=



36
6000
360600
=
