I often use LucidChart as a sketch area for ideas, concepts, etc. Because of the field I work in, I often find myself needing to draw geometric problems as a combination of straight lines and arcs. The straight lines I have covered, but an arc shape would be ideal.
I envision something akin to the “Arc by three points” tool found in many solid modelling programs; you have one pick point for each end of the arc, and a third pic-point for the center of the arc.
It is technically possible to reproduce this with the curved line type and manually adjusting the spline handles, but it is extremely tedious and does not update as connection points are moved around.