Explicație pas cu pas:
[tex] \frac{\ell_{1}}{\ell_{2}} = \frac{7}{2} \\ [/tex]
raportul perimetrelor:
[tex]\frac{ P_{1}}{P_{2}} = \frac{\ell_{1}}{\ell_{2}} = \frac{7}{2} \\[/tex]
raportul ariilor:
[tex]\frac{A_{1}}{A_{2}} = \Big(\frac{\ell_{1}}{\ell_{2}}\Big)^{2} = \Big(\frac{7}{2}\Big)^{2} = \frac{49}{4} \\ [/tex]