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.
Examples of Pie Chart
Video Examples: Drawing Pie Charts
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
Ques: 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.
Correct Answer: A
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.