Răspuns :
l=19,17:3
l=6,39
Pd=2L+2l
Pd=2x19,17+2x6,39=
38,34+12,78=
51,12
l=6,39
Pd=2L+2l
Pd=2x19,17+2x6,39=
38,34+12,78=
51,12
L =19.17
l =19.17/3 =6.39
P =2L+2 l
P =2*19.17 +2*6.39 =38.34 +12.78 =51.12 m
l =19.17/3 =6.39
P =2L+2 l
P =2*19.17 +2*6.39 =38.34 +12.78 =51.12 m