I'm trying to draw an arc that is centred on a point (the red line in the following screenshot).
I've have lat/longs for points A, B, C.
Points A and B are equidistant from C.
The reason I need it is to plot an airspace which is defined as starting at point A, centred on point C and ending at point B.
I'm using Cesium 1.44 on Chrome on Windows.