Graphs, ContinuedPie chartsPie charts are another way of illustrating a percentage breakdown. Pie chartswork well with information that is simple and has few divisions. To plot apie chart, you should know angular measurement and how to use aprotractor.AngularmeasurementA pie chart is based on a 360-degree circle. Three hundred sixty degreesrepresents 100 percent. You should have solid information on the percentagevalue that the segments of the pie represent. Multiply the percentagesindividually by 3.6 to find the degree of angle to plot with the protractor onthe pie. When you add up the plotted segments, you should have 100percent. The formula for determining angular measurement on a pie chart isto take the given percentage and multiply by 3.6.Figure 2-18 shows a completed pie chart.Figure 2-18. —A pie chart.2-25
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