Method that creates a new sketch arc that passes through the three input points.
| Name | Type | Description |
| StartPoint | Object | Input object that defines the start point. This can be either a SketchPoint or Point2d object. In the case where a SketchPoint object is input, that start point of the arc will be attached to the sketch point. |
| MidPoint | Point2d | Input Point2d object that defines a point along the arc. |
| EndPoint | Object | Input object that defines the end point. This can be either a SketchPoint or Point2d object. In the case where a SketchPoint object is input, that end point of the arc will be attached to the sketch point. |