a+b+c+d=360
{a,b,c,d}ip{1;0,5;1/3;0,25}
a=0,5b=c/3=0,25d=k
a=k
b=k/0,5=k/1:5/10=k/1x10/5=10k/5=2k
b=2k
c=3k
d=k/0,25=2/1:25/100=k/1x100/25=100k/25=4k
d=4k
inlocuim in relatia a+b+c+d=360
k+2k+3k+4k=360
10k=360
k=360/10
k=36
a=k=36,⇒unghiul A are 36 grade
b=2k=2x36=720⇒unghiul B are 72 grade
c=3k=3x36=108⇒ung.C are 108 grade
d=4k=4x36=144⇒ung.D are 144 grade
