\documentclass[varwidth=true, border=2pt]{standalone} \usepackage{tkz-euclide} \begin{document} \usetkzobj{all} \begin{tikzpicture} \tkzSetUpPoint[shape=circle,size=10,color=black,fill=black] \tkzSetUpLine[line width=1] \tkzDefPoints{0/0/A, 4/0/B, 2/2/C, 6/2/A'} \tkzMarkAngle[arc=l,size=1.15cm,color=green,fill=green!20,opacity=.8](A',A,C) \tkzLabelAngle[pos=0.9](A',A,C){$\alpha_1$} \tkzMarkAngle[arc=lll,size=1.15cm,color=green,fill=green!20,opacity=.8](B,A,A') \tkzLabelAngle[pos=0.9](B,A,A'){$\alpha_2$} \tkzMarkAngle[arc=l,size=0.7cm,color=red,fill=red!20,opacity=.8](C,B,A) \tkzLabelAngle[pos=0.5](C,B,A){$\beta$} \tkzMarkAngle[arc=l,size=0.6cm,color=blue,fill=blue!20,opacity=.8](A,C,B) \tkzLabelAngle[pos=0.4](A,C,B){$\gamma$} \tkzDrawSegments(A,B A,C A,A' B,C C,A') \tkzInterLL(A,A')(B,C)\tkzGetPoint{M} \node at ($(M) + (0.1,0.25)$) {$M$}; \tkzLabelPoint[below left](A){$A$} \tkzLabelPoint[below right](B){$B$} \tkzLabelPoint[above left](C){$C$} \tkzLabelPoint[above right](A'){$A'$} \tkzMarkAngle[arc=l,size=0.6cm,color=green,fill=green!20,opacity=.8](B,A,C) \path[draw] ++(25:.35) node[rotate=0] {$\alpha$}; \tkzDrawSegments(A,B A,C) \tkzDrawPoints(A,B,C,A',M) \end{tikzpicture} \end{document}