Răspuns :
P/2 = 40 cm.
P = 80 cm.
l = L/3
P = 2l+2L
P = 2L/3+2L
240 = 2L+6L
8L = 240
L = 30 cm.
l = 30/3
l = 10 cm.
Succes!
P = 80 cm.
l = L/3
P = 2l+2L
P = 2L/3+2L
240 = 2L+6L
8L = 240
L = 30 cm.
l = 30/3
l = 10 cm.
Succes!
L = 3l
P = 2 x SP = 2x40 = 80 cm
P = 80 = 2L + 2l
80 = 2x3l + 2l
80 = 8l
l = 10 cm
L = 30 cm
P = 2 x SP = 2x40 = 80 cm
P = 80 = 2L + 2l
80 = 2x3l + 2l
80 = 8l
l = 10 cm
L = 30 cm