Topic Content:
- Pie Chart
A pie chart is a circle which is divided into sectors, whose angles are used to represent data.
The size of the angle of each sector gives the frequency. A pie chart is useful in comparing the size of each part in relation to the whole.
Hint:
(i) Always give your pie chart a title
(ii) You need to use your protractor to draw the angles accurately. Check the sum of the angles = 360º
(iii) Label each sector clearly, but it is not compulsory to write the angles on the graph.
Example 3.1.1:
The pie chart below shows the weekly sales of a motor dealer in Lagos in 1999.
(a) What fraction of the cars were Toyota?
(b) What percentage of the cars were Datsun?
(c) If the dealer sold 16 Peugeots, how many BMWs did he sell in a week?
Solution:
(a)
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