How to draw simple angles like this?

Question

How can I draw something like this

Have you looked at https://tex.stackexchange.com/questions/219038/tikz-draw-angle-with-label-between-lines ? What is your current approach, your code? This is a very basic question that already has answers on here. — LonLon, Jun 17 '21 at 06:45

score 5 · Answer 1 · answered Jun 17 '21 at 07:05

\documentclass[margin=3mm, tikz]{standalone}
\usetikzlibrary{angles,
    quotes}
\begin{document}
    \begin{tikzpicture}
    \coordinate (O);
    \draw[red,-&gt;]   (O) -- (4,0)  coordinate[label=below:${x}$]  (x);
    \draw[blue,-&gt;]  (O) -- (-4,2)  coordinate[label=above:${y}$] (q);
    %
    \pic [draw, thick, &lt;-&gt;,
    angle radius=16mm,angle eccentricity=1.1,&quot;$\theta$&quot;]     {angle = x--O--q};
\end{tikzpicture}

\end{document}

score 3 · Accepted Answer · answered Jun 17 '21 at 10:03

3

A PSTricks solution just for either fun or comparison purpose.

This answer was prepared several years ago.

\documentclass[pstricks]{standalone}
\usepackage{pst-eucl}
\begin{document}
\begin{pspicture}(7,5)
    \pstGeonode[PointName=none,PointSymbol=none](1,4){A}(3,1){B}(6,1){C}
    \psline{<->}(A)(B)(C)
    \pstMarkAngle[MarkAngleRadius=1,LabelSep=.5]{C}{B}{A}{$120^\circ$}
\end{pspicture}
\end{document}

Note To Scale

answered Jun 17 '21 at 10:03

Display Name

46,933

What is "The Shortest Mustache Theorem" ? – hola Jun 17 '21 at 15:45
@hola: You can ask about this theorem and its story at this. – Display Name Jun 17 '21 at 20:29

How to draw simple angles like this?

2 Answers2