Pi day holiday Greek letter pi inside a green circle with pretty yellow and green pattern. March 14 is Pi day since pi equals π is the ratio of t

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Pi day holiday Greek letter pi inside a green circle with pretty yellow and green pattern. March 14 is Pi day since pi equals π is the ratio of the circumference of a circle to its diameter.

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Size: 3634px × 3634px
Photo credit: © Marianne A. Campolongo / Alamy / Afripics
License: Royalty Free
Model Released: No

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