How to draw an angle in Cindyjs?

I would like to draw a wedge that represents an angle:

In EaselJS I used shape.graphics.arc(x, y, radius, startAngle, endAngle);

How to do this with CindyJS? I do not get it to work with drawarc(‹point1›,‹point2›,‹point3›), see: https://jsfiddle.net/kai_noack/uLabvpqh/1/

What I need is to specify a start and end angle and it draws the arc with a given radius.

It would be great to have such a function in core, because I use it widely with geometry drawings.

PS: It would be great to have a library of all cindyjs examples where you can search through the entire source code. This way I would search for "drawarc" and see if there is something I can use. I searched the gallery by looking at the preview images only.

[montaga]

you should compute

A = P+polar(degstart°);
B = P+polar(degend°);

[montaga]

I think, you want to call

polar(alpha):=(cos(alpha),sin(alpha));
anglemark((0,0), polar(anglestart°), polar(angleend°), 4.5);

where anglestart and angleend are angles specified in degree and usee the original anglemark(P,A,B,r) function.