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raportul ariilor a doua patrate este  4 supra 9. aflati raportul perimetrelor

Răspuns :

[tex]\dfrac{A_1}{A_2}=\dfrac{l_1^2}{l_2^2}=\dfrac49\Rightarrow \dfrac{l_1}{l_2}=\sqrt{\dfrac49}=\dfrac23.[/tex]

[tex]\dfrac{P_1}{P_2}=\dfrac{4\cdot l_1}{4\cdot l_2}=\dfrac{l_1}{l_2}=\dfrac23 [/tex]