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GCSE Geography · key term
A circle whose area is scaled in proportion to the quantity it represents.
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Specification 4.1 · Component 1, Component 2, Component 3
Revise: Constructing Pie Charts, Pictograms and Proportional CirclesProportional circles compare quantities through the areas of circles; they can also be placed on a base map to show differences between locations.
Give every chart an explanatory title and a clear key or labels. Include the units represented by each pictogram symbol or proportional circle.
For proportional circles, scale the area, not the radius: four times the value needs twice the radius. Size-key circles must use exactly the same scale as the circles in the chart.
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