\documentclass[varwidth=true, border=2pt]{standalone} \usepackage{tkz-euclide} \usetkzobj{all} % Thanks to Jan Hlavacek for giving an example for hyperbolic triangles % (http://tex.stackexchange.com/a/16749/5645) % Thanks to Jonas Granholm for help with the angles % (http://tex.stackexchange.com/a/204435/5645) \usepackage{helvet} \usepackage[eulergreek]{sansmath} \begin{document} \begin{tikzpicture}[scale=3,font=\sffamily\sansmath] \tkzDefPoint(0,0){O} \tkzDefPoint(1,0){Z} % Define points \tkzDefPoint(-0.7,-0.1){A} \tkzDefPoint(0.4,-0.3){B} \tkzDefPoint(0.1,0.4){C} % Draw big circle \tkzDrawCircle[fill=white](O,Z) % I have no idea what this does, % but when I remove it the rest of the image (the big circles) % get visible. So it seems to crop the image to the size of the circle \tkzClipCircle(O,Z) % Draw angles \tkzMarkAngles[fill= orange,size=0.3cm,opacity=.3](B,A,C) \tkzLabelAngle[pos=0.2](B,A,C){$\alpha$} \tkzMarkAngles[fill= orange,size=0.3cm,opacity=.3](C,B,A) \tkzLabelAngle[pos=0.2](C,B,A){$\beta$} \tkzMarkAngles[fill= orange,size=0.3cm,opacity=.3](A,C,B) \tkzLabelAngle[pos=0.2](A,C,B){$\gamma$} % "Clip" angles \tkzDrawCircle[fill,orthogonal through=A and B,color=white](O,Z) \tkzDrawCircle[fill,orthogonal through=A and C,color=white](O,Z) \tkzDrawCircle[fill,orthogonal through=B and C,color=white](O,Z) % Draw big circle \tkzDrawCircle(O,Z) % Draw lines \tkzDrawCircle[orthogonal through=A and B,color=green](O,Z) \tkzDrawCircle[orthogonal through=A and C,color=blue](O,Z) \tkzDrawCircle[orthogonal through=B and C,color=red](O,Z) % Draw points and label them \tkzDrawPoints[color=black,fill=red,size=5](A,B,C) \tkzLabelPoints[below](A) \tkzLabelPoints[below left](B) \tkzLabelPoints[above left](C) \end{tikzpicture} \end{document}