Răspuns :
l =L-1.76
l =3.5-1.76 =1.74 cm
P =2L+2 l
P =2*3.5 - 2*1.74
P =7+3.48
P =10.48 cm
l = 3,5 - 1,76 = 1, 74 cm
P = 3,5 × 2 + 1,74 × 2 = 7 + 3,48 = 10,48 cm
P = 3,5 × 2 + 1,74 × 2 = 7 + 3,48 = 10,48 cm