
% Tikz File 'mytikz.tex'
\documentclass{standalone}
\usepackage{tikz}
%\usetikzlibrary{...}
\begin{document}    
\begin{tikzpicture}[x=0.75pt,y=0.75pt,yscale=-1,xscale=1,scale=.65]
%uncomment if require: \path (0,300); %set diagram left start at 0, and has height of 300
%Shape: Polygon [id:ds15311647952123697] 
\draw  [line width=1.5]  (58.77,82.05) -- (96.27,17.1) -- (133.73,82.07) -- (171.27,147) -- (96.27,147) -- (21.27,147) -- cycle ;

%Shape: Boxed Line [id:dp4276936768443609] 
\draw    (111.27,157) -- (96.27,157) -- (83.27,157) ;
\draw [shift={(81.27,157)}, rotate = 360] [color={rgb, 255:red, 0; green, 0; blue, 0 }  ][line width=0.75]    (10.93,-3.29) .. controls (6.95,-1.4) and (3.31,-0.3) .. (0,0) .. controls (3.31,0.3) and (6.95,1.4) .. (10.93,3.29)   ;
%Shape: Boxed Line [id:dp21806200320611024] 
\draw    (42.61,90.04) -- (50.11,77.05) -- (56.61,65.79) ;
\draw [shift={(57.61,64.06)}, rotate = 120] [color={rgb, 255:red, 0; green, 0; blue, 0 }  ][line width=0.75]    (10.93,-3.29) .. controls (6.95,-1.4) and (3.31,-0.3) .. (0,0) .. controls (3.31,0.3) and (6.95,1.4) .. (10.93,3.29)   ;
%Shape: Boxed Line [id:dp16086667194235704] 
\draw    (134.89,64.08) -- (142.39,77.07) -- (148.89,88.33) ;
\draw [shift={(149.89,90.06)}, rotate = 240] [color={rgb, 255:red, 0; green, 0; blue, 0 }  ][line width=0.75]    (10.93,-3.29) .. controls (6.95,-1.4) and (3.31,-0.3) .. (0,0) .. controls (3.31,0.3) and (6.95,1.4) .. (10.93,3.29)   ;
% Text Node
\draw (96.27,160.4) node [anchor=north] [inner sep=0.75pt]    {$\nu $};
% Text Node
\draw (48.11,73.65) node [anchor=south east] [inner sep=0.75pt]    {$\lambda $};
% Text Node
\draw (144.39,73.67) node [anchor=south west] [inner sep=0.75pt]    {$\mu $};
\end{tikzpicture}
\end{document}