Ad: Proof Is In The Pi (Pi On Baked Pie Geek Humor) Face Mask
Wry pi fan humor is alive and well on this cotton/polyester face mask featuring pi the mathematical constant and irrational number on a baked pie along with the following saying that will make others scratch their heads and wonder what you are referring to: "Proof Is In The Pi". Memorable face mask for any pi fan! myMathematician
#mathematician #irrational #number #math #proof #FaceMask
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