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Am nevoie urgentttt de rezolvarea acestui exercitiu.Ajutorrrr!

Am Nevoie Urgentttt De Rezolvarea Acestui ExercitiuAjutorrrr class=

Răspuns :

m(C)=180 grade -[m(P)+M(R)]=180 grade -[40+70]=180 grade-110 grade=70 grade