postulado 74, poligonos concavos ordenados 18
The length of the side most of the parallelogram circumscribed to a polygon concave ordered of the form one of dato ( m, r, n ) m more that r, r greater that n, n greater or equal that one, is equal to m by the length of the diagonal more of them parallelograms congruent in that is divided the polygon concave ordered.
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