I have this useful app. (Kind of tricky for me... ) Pretty easy to build a 90 degree turn, for example, with the radius of 10m. Just move control points (sliders) by 5.52m after adding a vertex 10m away.
When I want to shape a 60 degree turn with the same radius, this tool asks me to move sliders by 3.57m...
Anyone good at using this function?