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# Calculate an Arena

Calculator for the perimeter and size of an arena or stadium with different units. An arena has the shape of a bisected circle, where between the two semicircles a matching rectangle in inserted. Please enter length and width of the arena and choose the units. The length must be larger than the width. Perimeter and area will be calculated.

Units of measurement: cm=centimeter, dm=decimeter, m=meter, km=kilometer, in=inch, ft=foot, yd=yard, mi=mile, ²,sq=square, a=are, ha=hectare, ac=acre

### Formulas:

Length l, width w

Perimeter p = πw + 2(l-w)

Area A = πw²/4 + w(l-w)

An arena or stadium shaped field.

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