P=90m L=de 4 ori mai mare ca l ------------------------------------- ? L,l 90:2=45 am aflat Semiperimetrul(L+l) I---I---I---I---I reprezinta Lungimea} I---I reprezinta latimea } 45 semiperimetrul
45:5=9 am aflat latimea 9x4=36 am aflat Lungimea P=36+9+36+9 P=90