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Va rog,problema 17 dau coroana

Va Rogproblema 17 Dau Coroana class=

Răspuns :

tg(<ABC)=AC/AB=3/7

AC=3/7*AB

AB-AC=16

AB-3/7*AB=16

4*AB=112

AB=28(cm)

AC=28-16=12(cm)

BC=sqrt(12^2+28^2)=4*sqrt(58)

P=12+28+4*sqrt(58)=(40+4*sqrt(58)) cm

A=12*28/2=168(cm^2)

Bafta!!!