\documentclass[10pt]{article}
\usepackage{pgf,tikz}
\usepackage{mathrsfs}
\usetikzlibrary{arrows}
\pagestyle{empty}
\begin{document}
\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm,scale=0.3]  
\clip(-8.72,-9.48) rectangle (29.1,7.64);
\draw (-3,0)-- (0,0);
\draw (0,0)-- (3,0);
\draw (-4.4,0.75) node[anchor=north west] {$e$};
\draw (-0.5,1.5) node[anchor=north west] {$a$};
\draw (3,1.1) node[anchor=north west] {$b$};
\begin{scriptsize}
\draw [fill=black] (0,0) circle (2.5pt);
\draw [fill=black] (-3,0) circle (2.5pt);
\draw [fill=black] (3,0) circle (2.5pt);
\end{scriptsize}
\end{tikzpicture}


\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm,scale=0.3] 
\clip(-8.72,-9.48) rectangle (29.1,7.64);
\draw (-4,3)-- (-6,0);
\draw (-4,3)-- (-2,-3);
\draw (-4,3)-- (2,-3);
\draw (0,3)-- (-6,0);
\draw (0,3)-- (-2,-3);
\draw (0,3)-- (2,-3);
\draw (4,3)-- (-2,-3);
\draw (4,3)-- (2,-3);
\draw (4,3)-- (6,0);
\draw (2,-3)-- (6,0);
\draw (-6,0)-- (-2,-3);
\draw (-5,4) node[anchor=north west] {$e$};
\draw (0,4) node[anchor=north west] {$a$};
\draw (4,4) node[anchor=north west] {$b$};
\draw (5.5,0) node[anchor=north west] {$c$};
\draw (2.2,-2) node[anchor=north west] {$d$};
\draw (-2,-2) node[anchor=north west] {$f$};
\draw (-7,0) node[anchor=north west] {$g$};
\begin{scriptsize}
\draw [fill=black] (-4,3) circle (2.5pt);
\draw [fill=black] (0,3) circle (2.5pt);
\draw [fill=black] (4,3) circle (2.5pt);
\draw [fill=black] (6,0) circle (2.5pt);
\draw [fill=black] (2,-3) circle (2.5pt);
\draw [fill=black] (-2,-3) circle (2.5pt);
\draw [fill=black] (-6,0) circle (2.5pt);
\end{scriptsize}
\end{tikzpicture}
\end{document}