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P = 15,2 * 8,4 - 4 * 2,55^2 = 127,68 - 4 * 6,5025 = 127,68 - 26,01 = 101,67
Obwód tej nowej figury będzie taki sam jak prostokąta.
Obw. = 2 * (15,2 + 8,4) = 2 * 23,6 = 47,2