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1. Se considera dreptunghiul ABCD in exteriorul caruia se construiesc triunghiurile echilaterale ABN si BCM.
a) Daca AB = 8 cm si CD (e gresit, voia sa spuna BC) = 3/4 x AB, sa se calculeze aria dreptunghiului ABCD.
b) Sa se arate ca triunghiul AMN este isoscel.
c) Sa se arate ca [AM] = [CN].