Răspunsuri

2014-09-21T18:14:02+03:00
A=L.l=2.l.l
l²=98:2
l=√49=7
l=7 cm
L=2.l=2.7=14cm
P=2(L+l)=2(7+14)=2.21=42cm
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2014-09-21T18:14:43+03:00
A=L*l
2l*l=98
2l^2=98
l^2=49
l=7=>L=2*7=14
P=2(L+l)
P=2*21=42
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