**Definition of Pie Chart**

- A Pie Chart is a circular chart which is divided into sectors in which the area of each sector represents the size of the data.

**More about Pie Chart**

- It is also known as circle graph.
- Pie charts are used to show data in proportion.
- When all the sectors are combined together it forms a complete disk.

**Example of Pie Chart**

- The pie chart shown above represents the number of teachers for different subjects in a school.

The number at each pie slice indicates the number of teachers allotted for the particular subject.

As the pie chart shows, the number of teachers allotted for Mathematics is 24; the number of teachers allotted for Social Studies is 13; the number of teachers allotted for English is 15; the number of teachers allotted for Spanish is 10; and the number of teachers allotted for Science is 15.

**Solved Example on Pie Chart**

The pie chart shown below represents the percentage of dams built for different purposes. Find the total percentage of dams built for irrigation and hydroelectricity generation.

Choices:

A. 56%

B. 38%

C. 40%

D. 45%

Correct Answer: A

Solution:

Step 1:From the pie chart, the percentage of dams built for irrigation = 36

Step 2:Percentage of dams built for generating hydroelectricity = 20

Step 3:Percentage of dams built for irrigation and for generating hydroelectricity = 36 + 20 = 56 [Add the percentages.]

Step 4:So, 56% of the dams were built for irrigation and for generating hydroelectricity.

**Related Terms for Pie Chart**

- Area
- Circle Graph
- Data
- Graph
- Sector