[tex]obwod\ kwadratu:\ \ O=16\ m\\bok\ kwadratu:\ \ a=?\\\\wzor\ na\ obwod\ kwadratu:\\\\O=4a\\\\4a=16\ \ |:4\\\\a=4\ m\\\\wzor\ na\ przekatna\ kwadratu:\\\\d=a\sqrt{2}\\\\d=4\sqrt{2}\ \ m\\\\odp.\ \ C.[/tex]
