\input{Dias.tikz}

\tikzstyle{col} =
[
   text width=3.5cm,
]


\begin{tikzpicture}
[
      node distance=1cm,
      inner sep=0.2cm,
]
      \pgfmathparse{5} \let\w\pgfmathresult;
      
      %First (left) column
      \node[mybox,col]
      at ($(0,1*\h)$) (segmento)
      {Segmento};
      
      \node[mybox,col]
      at ($(0,0*\h)$) (separa) 
      {Reta que Separa o Plano};

      %Second column
      \node[mybox,col]
      at ($(\w,1*\h)$)  (angulo)
      {Ângulo};
      
      \node[mybox,col]
      at ($(\w,0*\h)$)   (semiplano) 
      {Semiplano};

   
      \draw [arrow] (segmento.east) -- (semiplano.west);
      \draw [arrow] (separa.east)   -- (semiplano.west);

      %Third column
      \node[mybox,col] 
      at ($(2*\w,0.5*\h)$)   (interior)
      {Interior de Ângulo};

      \draw [arrow] (angulo.east)    -- (interior.west);
      \draw [arrow] (semiplano.east) -- (interior.west);
\end{tikzpicture}
