Răspuns:
Explicație pas cu pas:
a)L=8cm l=5cm
P=2(L+l)=2(8+5)=2×13=26 cm
b)L=35 m l=27m
P=2(L+l)=2(35+27)=2×62=126m
c) P=18cm L+l=9 L+3=9 L=6 cm
d)P=54cm L+l=27 L+12=27 L=15cm
e)P=20cm L+l=10cm 7+l=10 l=3 cm
f) P=100cm L+l=50 28+l=50 l=22cm
