Răspuns :
P=2(L+l)=184
L+l=184/2=92
l/2+2=L/4
2l+8=L
2l+8+l=92
3l=92-8
3l=84
l=28 cm
L=28×2+8=56+8=64 cm
L+l=184/2=92
l/2+2=L/4
2l+8=L
2l+8+l=92
3l=92-8
3l=84
l=28 cm
L=28×2+8=56+8=64 cm
[tex]\it \mathcal{P} =2(L+\ell) =184|_{:2} \Rightarrow L+\ell = 92 \ \ \ (1)[/tex]
[tex]\it \dfrac{L}{4} = \dfrac{\ell}{2} +2 \Rightarrow L=2\ell +8\ \ \ (2)[/tex]
[tex]\it (1),\ (2) \Rightarrow 2\ell + 8 +\ell = 92 \Rightarrow 3\ell=84|_{:3} \Rightarrow \ell = 28\ cm\ \ \ (3)[/tex]
[tex]\it(2),(3) \Rightarrow L = 2\cdot28+8 \Rightarrow L = 64\ cm [/tex]
[tex]\it \dfrac{L}{4} = \dfrac{\ell}{2} +2 \Rightarrow L=2\ell +8\ \ \ (2)[/tex]
[tex]\it (1),\ (2) \Rightarrow 2\ell + 8 +\ell = 92 \Rightarrow 3\ell=84|_{:3} \Rightarrow \ell = 28\ cm\ \ \ (3)[/tex]
[tex]\it(2),(3) \Rightarrow L = 2\cdot28+8 \Rightarrow L = 64\ cm [/tex]