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Raportul lungimilor laturilor a doua patrate este 7/9 . Aflati raportulu a) perimetrelor b)ariilor

Răspuns :

      
[tex] \frac{l_1}{l_2}= \frac{7}{9} \\ \\ \frac{P_1}{P_2}= \frac{4l_1}{4l_2}= \frac{4*7}{4*9} = \frac{7}{9} \\ \\ \frac{A_1}{A_2} = \frac{l_1^2}{l_2^2}=\frac{7^2}{9^2} =\frac{7^2}{9^2}=\frac{49}{81}[/tex]