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Gandire22id
L=3/4l A=L*l A=3l²/4 A=48 rezulta ca 3l²/4=48 3l²=192 l²=64 l=8 L=3/4*8=6 deci P=2L+2l=2*6+2*8=12+16=28
[tex]Ll=48;\ \ l=\dfrac34L\Rightarrow \dfrac34L^2=48\Rightarrow L^2=64\Rightarrow [/tex]

[tex]\Rightarrow L=8\ cm;\l=\dfrac34\cdot8=6\ cm [/tex]

[tex]P=2(L+l)=28\ cm[/tex]

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