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Răspuns :

P (dreptunghi)= 4•2+ 2•2+ 8+4= 12 cm

P (pătrat)= 4•l= 12cm => l=12:4=3cm

A (dreptunghi) = L•l= 4•2= 8cm2

A(pătrat)= l2= 3 2 = 9cm2

A p - A d= 9-8= 1 cm2