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Ajutorrrrrrrrrrrrrrrrrrr ! Perimetrul cu laturile de 12 cm,180mm,1.5dm

Răspuns :

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

P=12000mm+180mm+150mm

P=12000mm+330mm

P=12330mm