Răspuns :
aduni apoi imparti la radical si o faci sub forma de fractie
cos c=AC/bc
cos C=3√3/6
cos C=√3/2=30 grade
∡C=30
cos B=AB/BC
cos B=3/6=1/2
cos B=60 grade
∡B=60
∡A=180-(60+30)
∡A=90
cos C=3√3/6
cos C=√3/2=30 grade
∡C=30
cos B=AB/BC
cos B=3/6=1/2
cos B=60 grade
∡B=60
∡A=180-(60+30)
∡A=90