Hallo liebe User,
ich habe es geschafft, danke noch einmal für eure Hilfe.
enter \documentclass{scrartcl}
\usepackage[T1]{fontenc}
\usepackage[utf8x]{inputenc}
\usepackage{lmodern}
\usepackage{fullpage}
\usepackage{amsmath,amssymb,amsfonts}
\usepackage{tkz-tab,tkz-euclide,tkz-fct,tkz-base}
\usetkzobj{all}
\begin{document}
\begin{tikzpicture}
\tkzDefPoint(0,0){A} \tkzDefPoint(7,0){B}
\tkzDefSquare(A,B) \tkzGetPoints{C}{D}
\tkzDrawPolygon[color = blue](B,C,D,A)
\tkzDefPoint(3,0){I} \tkzDefPoint(7,3){J}
\tkzDefSquare(I,J)
\tkzGetPoints{K}{L}
\tkzDrawPolygon(I,J,K,L)(A,I,L)
(I,B,J)(K,D,L)
(K,C,J)
\tkzLabelLine[above](A,I){$a$}
\tkzLabelLine[below](K,C){$a$}
\tkzLabelLine[right](A,L){$b$}
\tkzLabelLine[left](B,J){$a$}
\tkzLabelLine[above](I,B){$b$}
\tkzLabelLine[below](K,D){$b$}
\tkzLabelLine[above](I,J){$c$}
\tkzLabelLine[below](K,J){$c$}
\tkzLabelLine[below](K,L){$c$}
\tkzLabelLine[right](L,D){$a$}
\tkzLabelLine[right](L,I){$c$}
\tkzLabelLine[left](C,J){$b$}
\end{tikzpicture}
\end{document}
here
Gruß
Martin
