Buna!
DEFG->patrulater convex=> suma tuturor unghiurilor=360 grade
E=60/100•D=6D/10
F=80/100•D=8D/10
G=30/100•D=3D/10
din toate 3=>
D+6D/10+8D/10+3D/10=360 inmultim cu 10
10D+6D+8D+3D=3600
27D=3600
=>D=133,(3)
=>E=6•133,(3)/10=80 grade
=>F=8•133,(3)/10=106,666664 grade
=>G=3•133,(3)/10=39,(9) grade
rezultatul e ciudat desi am verificat de mai multe ori