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2014-04-26T18:11:37+03:00
Pai perimetrul=2(L+l)=> 34=2(12+l)=> 34=24+2l=> 2l=34-24=>l=5
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2014-04-26T18:12:00+03:00
P=2L+2l⇒34 cm= 2*12 cm +2l⇒34=24+2l⇒10=2l⇒5=l
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