bonjour
tu poses le théorème de Thalès
CE/CB = CD/CA = ED/BA
CE/CB = DC/CA
CE/6 = 5.6/8.4
donc CE = 4 cm
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bonjour
tu poses le théorème de Thalès
CE/CB = CD/CA = ED/BA
CE/CB = DC/CA
CE/6 = 5.6/8.4
donc CE = 4 cm