Look there ma!!!!!!!!  Two more 13s....................reflex sym................and two more golden ratios.............

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Pi - Wikipedia

https://en.wikipedia.org/wiki/Pi

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The number π is a mathematical constant. Originally defined as the ratio of a circle's circumference to its diameter, it now has various equivalent definitions and appears in many formulas in all areas of mathematics and physics. It is approximately equal to 3.14159. It has been represented by the Greek letter "π" since the ...

‎Squaring the circle · ‎Pi (letter) · ‎Approximations of π · ‎Mathematical constant

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