1triangle orientation 0 2\documentclass[tikz]{standalone} 3 4\usepackage{pgflibraryshapes} 5\usetikzlibrary{backgrounds} 6\usetikzlibrary{arrows} 7\begin{document} 8\begin{tikzpicture}[scale = 1.,font=\fontsize{8}{8}\selectfont] 9\path (-2.,-2.) node(3_0) [draw,shape=circle,color=gray] {3}; 10\path (2.,-2.) node(4_0) [draw,shape=circle,color=gray] {4}; 11\path (-2.,2.) node(5_0) [draw,shape=circle,color=gray] {5}; 12\path (0.,0.) node(6_0) [draw,shape=circle,color=gray] {6}; 13\path (-2.,0.) node(7_0) [draw,shape=circle,color=gray] {7}; 14\path 15(-1.,-1.) node(8_0) [draw,shape=circle,color=gray] {8} -- 16(-1.,0.) node(9_0) [draw,shape=circle,color=gray] {9} -- 17(0.,-2.) node(10_0) [draw,shape=circle,color=gray] {10} -- 18(1.,-1.) node(11_0) [draw,shape=circle,color=gray] {11} -- 19(-1.,1.) node(12_0) [draw,shape=circle,color=gray] {12} -- 20(-2.,1.) node(13_0) [draw,shape=circle,color=gray] {13} -- 21(-2.,-1.) node(14_0) [draw,shape=circle,color=gray] {14} -- 22(0,0); 23\draw[color=gray] (3_0) -- (10_0) -- (4_0) -- (11_0) -- (6_0) -- (8_0) -- (3_0); 24\draw[color=gray] (6_0) -- (12_0) -- (5_0) -- (13_0) -- (7_0) -- (9_0) -- (6_0); 25\draw[color=gray] (7_0) -- (14_0) -- (3_0) -- (8_0) -- (6_0) -- (9_0) -- (7_0); 26\path (0.,-1.33333) node(0_0) [] {}; 27\path (-1.33333,0.666667) node(1_0) [] {}; 28\path (-1.33333,-0.666667) node(2_0) [] {}; 29\end{tikzpicture} 30\end{document} 31