\input{../Dias.tikz}

\pgfmathparse{3} \let\w\pgfmathresult;

\tikzstyle{mybox1} =
[
      text width=2cm
]
\tikzstyle{teste}=[white]

\begin{tikzpicture}
[
      node distance=2cm,
      inner sep=0.2cm,
]

      \pgfmathparse{3.5} \let\x\pgfmathresult;
\pgfmathparse{2} \let\y\pgfmathresult;
\pgfmathparse{1} \let\yy\pgfmathresult;

      \draw [-latex] (-\x,0) -- (\x,0) node[right] {$x$};
      \draw [-latex] (0,-\y) -- (0,\y) node[above] {$y$};
      
      \node[mybox,text width=5cm] (GN)
      at (0,0)
      {
         Geometria Neutra\\
         (axiomas da geometria neutra)
      };
      
      \node[mybox,text width=6.25cm] (GE)
      at (-\x,-\y)
      {
         Geometria Euclidiana\\
         (axioma de paralelismo de Euclides)
      };
      
      
      \node[mybox,text width=6.25cm] (GH)
      at (\x,-\y)
      {
         Geometria Hiperb\'olica\\
         (axioma de paralelismo de Lobachevsky)
      };
      
      \coordinate (C) at  ( 0,-\yy);
      \coordinate (PL) at (-\x,-\yy);
      \coordinate (PR) at ( \x,-\yy);
      
      \draw[] (GN.south) -- (C);
      \draw[] (PL) -- (C);
      \draw[] (PR) -- (C);
      \draw[] (PL) -- (GE.north);
      \draw[] (PR) -- (GH.north);
\end{tikzpicture}
