a,b,c,d,e -masurile unghiurilor
a,b,c,d,e ip cu 2,3,4,6,12
2a=3b=4c=6d=12e=k
a=k/2
b=k/3
c=k/4
d=k/6
e=k/12
k/2+k/3+k/4+k/6+k/12=360 aducem la acelasi numitor
6k+4k+3k+2k +k =4320
16k=4320
k=270
a=270/2=135°
b=270/3=90°
c=270/4=67° 2'
d=270/6=45°
e=270/12=22° 6'
