In Google Drawings you can create a polyline, which is a line with points in it where the line can be "bent." Once you've created the polyline with some number of points, you can edit the polyline to change the location and orientation of the points.
Is there a way to add or remove points?
Or do you have to create a new line?
This Page from 2010 said this feature doesn't exist. I couldn't find anything more recent that said one way or another.