\documentclass[tikz,border=10pt]{standalone} \usetikzlibrary{angles,calc,decorations.markings} \begin{document} \begin{tikzpicture}[thick, draw only after/.style = { preaction ={decorate, decoration={markings,mark=at position 0 with {\pgfmathsetmacro\mypoff{\pgfdecoratedpathlength*#1}\xdef\mypoff{\mypoff} \pgfmathsetmacro\mypl{\pgfdecoratedpathlength}\xdef\mypl{\mypl}}}}, postaction={draw, dash pattern = on 0pt off \mypoff…
\documentclass[border=10pt,tikz]{standalone} \usepackage{dsfont} \usetikzlibrary{angles, decorations.pathmorphing} \begin{document} \tikzset{smallcircle/.style = {circle, draw, fill=white, inner sep=2pt}} \def\r{1.2} \newcommand*{\U}[5]{% \path (#2,#3) coordinate (0) +(#4:\r) coordinate (1) +(#5:\r) coordinate (2) pic[thick,…