Prima data invata lima romana si apoi apuca-te de matematica.
Rezolvare:<A/3=<B/4=(<C/5=<D/6=<A+<B+<C+<D)/(3+4+5+6)=360/18;=20/1;
<A/3=20/1,rezulta <A=20*3=60grade;<B/4=20/1;<B=20*4=80 grade; <C/5=20/1;<C=20*5=100 grade. <D=360-(60+80+100)=360-240=120 grade.