I have the following image

enter image description here

As you can see, the points $A, B, C$ have serifes. I would like them to be without serifes. I do I change the font for \tkzLabelPoints?. (font=\sffamily\sansmath does not work)

MWE

\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}

The labels of points are TikZ nodes, and you can add options to \tkzLabelPoints as with normal nodes, so doing \tkzLabelPoints[below,font=\sansmath](A) works for a single label. To set this for all point labels, you can modify the label style style, which is used for them, with

label style/.append style={font=\sansmath}

added to the tikzpicture options.

enter image description here

Complete code:

\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,label style/.append style={font=\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}

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.