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Dau coroana!!!!!!!!!!!!

Dau Coroana class=
Dau Coroana class=

Răspuns :

EF || BC => conform teoremei lui Thales ca
AE/AB=AF/AC=EF/BC
AE/AB=12/18=2/3
=> AF/AC=2/3=>
3AF=2AC =>
3AF=73
=> AF=24
EB = AB-AE=6
FC=AC-AF=> FC=36-24