postulado 11 paralelogramos 21
If ( m, r ) or ( r, m ) m greater than r, r greater than or equal to one, is the order of a rectangle divided in congruent rectangles or a diamond shape divided into congruent rhomboids, are the two, if length greater side and the lower rectangle side base or rhomboid base are divided m times r times respectively with the length of the shortest and longest congruent parallelograms sides respectively.