Răspuns :
l1/10 = l2/4= l3/6 = k/1
l1= 10 k
l2= 4K
l3= 6k
l1+l2+l3= 180 grade
10k+4K + 6k= 180 grade
20k= 180 grade
K=9
l1= 90
l2=32
l3=54
l1= 10 k
l2= 4K
l3= 6k
l1+l2+l3= 180 grade
10k+4K + 6k= 180 grade
20k= 180 grade
K=9
l1= 90
l2=32
l3=54