Question

Raportul perimetrelor a doua patrate este 1,8 . Care este raportul arilor

Answer 1

$\frac{P_1}{P_2}=1,8 \\\\ \frac{P_1}{P_2}=\frac{\not18}{\not10} \\\\ \frac{P_1}{P_2}=\frac{9}{5} \\\\ \frac{\not4l_1}{\not4l_2}=\frac{9}{5} \\\\ \frac{l_1}{l_2}=\frac{9}{5} \\\\ \frac{A_1}{A_2}=\frac{l_1^2}{l_2^2} \\\\ \frac{A_1}{A_2}=\frac{9^2}{5^2} \\\\ \boxed{\frac{A_1}{A_2}=\frac{81}{5}}$