Răspuns:
Explicație pas cu pas:
P=2(L+l)
P=42+2=>P=44cm
l=10cm
44=2(10+L)
44:2-10=L=>L=12cm
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Răspuns:
Explicație pas cu pas:
Răspuns:
P=2(L+l)
P=42+2=>P=44cm
l=10cm
44=2(10+L)
44:2-10=L=>L=12cm