Ho provato a inserire il codice della figura nel codice della soluzione... Questa volta non dà warning o errori ma nel pdf visualizza uno pseudocodice incomprensibile
Io ho messo tutti i package in alto, poi ci sono delle balle varie... Poi c'è il codice della mia figura e infine ci sarebbe la soluzione scritta del mio esercizio.
\documentclass[12pt]{article}
\usepackage[Italian]{babel}
\usepackage[a4paper]{geometry}
\usepackage{pgf,tikz}
\usetikzlibrary{arrows}
\pagestyle{empty}
\newcommand{\degre}{\ensuremath{^\circ}}
[...]
\Soluzione{G1}
\begin{document}
\definecolor{xdxdff}{rgb}{0.66,0.66,0.66}
\definecolor{qqwuqq}{rgb}{0.13,0.13,0.13}
\definecolor{uququq}{rgb}{0.25,0.25,0.25}
\definecolor{zzttqq}{rgb}{0.27,0.27,0.27}
\definecolor{qqqqff}{rgb}{0.33,0.33,0.33}
\begin{tikzpicture}[line cap=round,line join=round,>=triangle 45,x=1.0cm,y=1.0cm]
\clip(-3.74,-2.34) rectangle (14.65,6.67);
\fill[color=zzttqq,fill=zzttqq,fill opacity=0.1] (0.61,5.15) -- (-1.92,0.79) -- (9.59,0.42) -- cycle;
\draw[color=qqwuqq,fill=qqwuqq,fill opacity=0.1] (0.54,2.82) -- (0.67,3.33) -- (0.16,3.46) -- (0.03,2.95) -- cycle;
\draw[color=qqwuqq,fill=qqwuqq,fill opacity=0.1] (3.06,-1.46) -- (2.91,-0.95) -- (2.41,-1.1) -- (2.55,-1.6) -- cycle;
\draw[color=qqwuqq,fill=qqwuqq,fill opacity=0.1] (0.14,3.3) -- (0.41,3.76) -- (-0.05,4.02) -- (-0.31,3.56) -- cycle;
\draw[color=qqwuqq,fill=qqwuqq,fill opacity=0.1] (1.81,0.67) -- (1.83,1.2) -- (1.3,1.22) -- (1.28,0.69) -- cycle;
\draw
(0.61,5.15)-- (-1.92,0.79);
\draw (-1.92,0.79)-- (9.59,0.42);
\draw (9.59,0.42)-- (0.61,5.15);
\draw [domain=-3.74:14.65] plot(\x,{(-2.86--0.26*\x)/-0.97});
\draw [domain=-3.74:14.65] plot(\x,{(--2.01-0.96*\x)/0.28});
\draw [domain=-3.74:14.65] plot(\x,{(-0.73-0.97*\x)/-0.26});
\draw [domain=-3.74:14.65] plot(\x,{(-2.25--0.28*\x)/0.96});
\draw [domain=-3.74:14.65] plot(\x,{(--7.58-4.56*\x)/2.52});
\draw(1.34,2.6) circle (1.92cm);
\draw (1.34,2.6)-- (-0.31,3.56);
\draw (1.34,2.6)-- (1.28,0.69);
\fill (0.61,5.15) circle (1.5pt);
\draw (1.26,5.48) node {$C$};
\fill (-1.92,0.79) circle (1.5pt);
\draw (-2.12,0.48) node {$A$};
\fill (9.59,0.42) circle (1.5pt);
\draw (9.48,-0.06) node {$B$};
\fill (0.03,2.95) circle (1.5pt);
\draw[color=uququq] (-0.3,2.81) node {$E$};
\fill [color=uququq] (2.55,-1.6) circle (1.5pt);
\draw[color=uququq] (1.91,-1.32) node {$D$};
\fill [color=uququq] (1.34,2.6) circle (1.5pt);
\draw[color=uququq] (1.86,3.08) node {$I$};
\fill [color=uququq] (1.28,0.69) circle (1.5pt);
\draw[color=uququq] (0.99,0.26) node {$K$};
\fill [color=uququq] (-0.31,3.56) circle (1.5pt);
\draw[color=uququq] (-0.95,3.9) node {$L$};
\draw[color=qqwuqq] (0.37,3.23) node {$90\textrm{\degre}$};
\draw[color=qqwuqq] (2.78,-1.18) node {$90\textrm{\degre}$};
\draw[color=qqwuqq] (0.07,3.78) node {$90\textrm{\degre}$};
\draw[color=qqwuqq] (1.59,1.08) node {$90\textrm{\degre}$};
\fill [color=xdxdff] (1.27,7.63) circle (1.5pt);
\end{tikzpicture}
[...]
Magari da domani vado con un'altra materia e spero che sto cavolo di problema delle immagini si risolva 
e alcune versioni di teXnic Center non andavano d'accordo con l'install packages on the fly...