## 2 pi r

by AdamStanislav - uploaded on April 3, 2016, 4:37 am

2πr, the formula of the circumference of a circle, written by hand.

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- Tags
- 2 pi r 2πr Greek alphabet Greek letter Ludolph van Ceulen Ludolphine number circle circumference geometria geometry handwritten matematika math mathematics maths pi trigonometria trigonometry π
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