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Urgent dau coroana ​

Urgent Dau Coroana class=

Răspuns :

sin<abc=sin 60°=ac/bc=√3/2=6/bc

bc=6×2/√3=4√3

sin<bac=sin 30°=ab/bc=1/2=ab/4√3

ab=2√3

Aria triunghiului=6×4√3:2=12√3 cm^2