Răspuns :
12cm=12000mm
1.5dm=150mm
Perimetrul=12000mm+180mm+150mm
=12000mm+330mm
=12330mm
1.5dm=150mm
Perimetrul=12000mm+180mm+150mm
=12000mm+330mm
=12330mm
12cm=12000mm
1.5dm=150mm
P=12000mm+180mm+150mm
P=12000mm+330mm
P=12330mm
1.5dm=150mm
P=12000mm+180mm+150mm
P=12000mm+330mm
P=12330mm