There are two ways of creating an arc with three points using the
Curve Editor tab.
Creating an arc through three points on the arc
- Click Curve Editor tab > Create panel > Circles & Arcs > Three Point Arc.
- Select the start point of the arc.
- Select the end point of the arc.
- Select any mid point in the arc (this defines the radius of the arc).
Creating an arc through the centre and two points on the arc
- Click Curve Editor tab > Create panel > Circles & Arcs > Centre Point Arc.
- Select the centre point of the arc.
- Select the start point of the arc (this defines the radius of the arc).
- Select the end point of the arc.
For more information see the creating an arc using three items, and
creating circles and arcs examples.