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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.

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    \begin{tikzpicture} \node[draw,minimum size=1cm,regular polygon,regular polygon sides=10] (a) {}; \end{tikzpicture}? –  Jul 24 '20 at 21:22
  • Oh, you need \usetikzlibrary{shapes.geometric} in your preamble. –  Jul 24 '20 at 21:29
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    Welcome to the TEX.SE. Do this link could be to help for you? https://tex.stackexchange.com/questions/152191/draw-vertices-of-regular-polygon – Sebastiano Jul 24 '20 at 21:31

2 Answers2

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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}
% Radius of regular polygons
\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}

enter image description here

Sebastiano
  • 54,118
1

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) \pstVerb{/Offset 30 def}% \curvepnodes[plotpoints=11]{0}{360}{3 t Offset add PtoC}{A} \psnpolygonlinecolor=red{A} \end{pspicture} \end{document}

enter image description here

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) \pstVerb{/Offset \i\space def}% \curvepnodes[plotpoints=13]{0}{360}{3 t Offset add PtoC}{A} \psnpolygonlinecolor=red{A} \end{pspicture}} \end{document}

enter image description here

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