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The earliest known pie chart is generally credited to William Playfair's Statistical Breviary of 1801, where two such graphs are used according to WikiPedia Some sources say Florence Nightingale invented the Pie Chart in 1857, but in fact even the Florence Nightingale museum admits she did not. She was an amazing person, but unfortunately not the inventor of the pie chart.

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15y ago

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Q: Who invented the pie chart?
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