A pie chart or circle graph is a diagram used to compare parts of a whole. The full pie represents the whole, and it is divided into sectors that each represent something that is a part of the whole. Each sector or slice of the pie is either labeled to indicate what it represents, or explained on a key associated with the chart. The size of each slice is determined by the percentage of the whole that the associated quantity represents. Numerically, the angle measurement of each sector can be computed by solving the proportion: x/360 = part/whole.
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Last updated: 12/18/2017
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