Pie chart

A pie chart is a circular statistical graphic which is divided into slices to illustrate numerical proportion. In a pie chart, the arc length of each slice is proportional to the quantity it represents. While it is named for its resemblance to a pie which has been sliced, there are variations on the way it can be presented.

The earliest known pie chart is generally credited to William Playfair's Statistical Breviary of 1801.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 4.0

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