Question

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

Answer 1

      
$\frac{l_1}{l_2}= \frac{7}{9} \\ \\ \frac{P_1}{P_2}= \frac{4l_1}{4l_2}= \frac{4*7}{4*9} = \frac{7}{9} \\ \\ \frac{A_1}{A_2} = \frac{l_1^2}{l_2^2}=\frac{7^2}{9^2} =\frac{7^2}{9^2}=\frac{49}{81}$