Răspuns :
aflam latimea 2 supra 3 din 9= (9/3)*2=6
aria 6*9=54 cm patrati
aria 6*9=54 cm patrati
[tex]L=9cm\;\;;\;\;l=\frac{2\cdot{L}}{3}\;\\
A_{dreptunghi}=L\cdot{l}=\frac{\not9^3}{1}\cdot\frac{2\cdot{9}}{\not3_1}=54\,cm^2[/tex]
A_{dreptunghi}=L\cdot{l}=\frac{\not9^3}{1}\cdot\frac{2\cdot{9}}{\not3_1}=54\,cm^2[/tex]