Răspunsuri

2014-03-26T14:58:13+02:00
L=3l
Perim=L+L+l+l=400
3l+3l+l+l=400
8l=400
l=400:8
l=50

L=3x50
L=150

Verificare:
150+150+50+50=400?
300+100=400?
400=400 ADEVARAT
2014-03-26T15:27:49+02:00
L=3l
Perim=L+L+l+l=400
3l+3l+l=400
8l=400
l=400:8
l=50
L=3x50
L=150
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