bjr
aire figure = aire de ABCD + aire BFGH
aire ABCD = AB * AB = 7 * 7 = 49 cm²
et
aire BFGH = EB x BF = a * a = a²
donc aire figure = a² + 49
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bjr
aire figure = aire de ABCD + aire BFGH
aire ABCD = AB * AB = 7 * 7 = 49 cm²
et
aire BFGH = EB x BF = a * a = a²
donc aire figure = a² + 49