# Draw a decagon in LaTeX

I need to draw a graph with 10 nodes in LaTeX. I thought about doing it with tikz and try to give exact coordinates to draw a decagon but I don't know what coordinates to give.

• \begin{tikzpicture} \node[draw,minimum size=1cm,regular polygon,regular polygon sides=10] (a) {}; \end{tikzpicture}?
– user220367
Jul 24, 2020 at 21:22
• Oh, you need \usetikzlibrary{shapes.geometric} in your preamble.
– user220367
Jul 24, 2020 at 21:29
• Welcome to the TEX.SE. Do this link could be to help for you? tex.stackexchange.com/questions/152191/… Jul 24, 2020 at 21:31

In this link you can find a series of regular polygons...I have changed the code to have the penthagon. Here the drawing is without coordinates.

\documentclass[12pt]{article}
\usepackage{tikz}
\begin{document}
\newdimen\R
\R=1cm
This is a pentagon $n=10$,
\begin{tikzpicture}
\draw[yshift=-6.0\R] (0:\R) \foreach \x in {36,72,...,359} {
-- (\x:\R)
} -- cycle (90:\R) node[above] {$\scriptstyle n=10$} ;
\end{tikzpicture}
that it could be used as a symbol.
\end{document}


A solution with PSTricks only for either fun or comparison purposes.

curvepnodes is useful to define an array of nodes for any given number of nodes and curve functions. For example, we can use it to make an array of 12 nodes on a circle. Offset is provided as the rotation offset.

\documentclass[pstricks,margin=5mm]{standalone}
\usepackage{pst-node,pst-plot}

\begin{document}
\begin{pspicture}[showpoints,dotscale=1](-4,-4)(4,4)
\pstVerb{/Offset 30 def}%
\psnpolygon[linecolor=red](0,\numexpr\Anodecount-1){A}
\end{pspicture}
\end{document}


# Animated version

\documentclass[pstricks,margin=5mm]{standalone}
\usepackage{pst-node,pst-plot}

\begin{document}
\multido{\i=0+10}{10}{%
\begin{pspicture}[showpoints,dotscale=6](-4,-4)(4,4)
\pstVerb{/Offset \i\space def}%