Pie Diagram: When entire data and its different components are represented by dividing the circle in degrees proportional to the data, then a pie diagram is obtained. The degree for a component on a circle is obtained by the following formula:
Degree = \(\frac{Component\, value}{ Total \,value } × 100\)
Points to be considered while drawing a Pie Diagram:
- 360° degrees make a circle.
- Degrees of sub-divisions are calculated and the sum of the degrees of all such sub-divisions must be 360°.
- For comparing the relevant data over two time periods or regions two pie diagrams are to be drawn side by side by taking the radius of circle proportional to their data set.
