Răspuns :
[tex]\it \ell=29\ m\\ \\ L=3\cdot\ell=3\cdot29\ m\\ \\ Suma\ celor\ patru\ laturi\ este :\\ \\ L+\ell+L+\ell =3\cdot29+29+3\cdot29+29=29\cdot(3+1+3+1) =29\cdot8=[/tex]
[tex]\it \ell=29\ m\\ \\ L=3\cdot\ell=3\cdot29\ m\\ \\ Suma\ celor\ patru\ laturi\ este :\\ \\ L+\ell+L+\ell =3\cdot29+29+3\cdot29+29=29\cdot(3+1+3+1) =29\cdot8=[/tex]