Răspuns :
l=L/3
P=98,24 cm
P=2(L+ l)
98,24=2(L+L/3)
98,24:2=4L/3
4L=3×49,12
L=147,36:4=36,84 cm
l=36,84:3=12,28 cm
P=98,24 cm
P=2(L+ l)
98,24=2(L+L/3)
98,24:2=4L/3
4L=3×49,12
L=147,36:4=36,84 cm
l=36,84:3=12,28 cm