Marianne Campolongo Photography

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Pi symbol with the sum formula pi equals 3.1415 inside the pi symbol to celebrate Pi Day of the century on 3.14.15 and for general teaching, education, math, and science concepts.
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© 2015 Marianne A. Campolongo
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2958x2994 / 1.1MB
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Pi symbol with the sum formula pi equals 3.1415 inside the pi symbol to celebrate Pi Day of the century on 3.14.15 and for general teaching, education, math, and science concepts.