Geometry App: Ellipse does not draw in Degrees Mode

[parisse]

The geometry app is using the giac CAS for internal computation, ellipse is a CAS command, the display is obtained by a trigonometric parametrization of the ellipse. I can of course change the parametrization if the user is in degree mode, but like any CAS, giac is designed to work in radians not in degrees, I'm certain you would get problems later. There are a few functions that are also working in degree, but as soon as you are using non trivial functions, you should always use radian mode. Perhaps ellipse should force radian mode...