postulado 82, poligonos concavos ordenados 20
The perimeter of the polygon concave ordered, where the sides of the broken lines have two different and data length ( m, mm, n ) m greater than n, n greater or equal to one, is equal to 2 ( 2m - 41 n; by the sum of the lengths of the sides of longer and shorter length of the sides of the broken lines.
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