You can use Power trim to extend sketch entities along their natural paths.
Arcs have a maximum extension length on either side of the arc. Once you reach the maximum extension length, the extension shifts to the opposite side.
To extend with the Power trim option:
- Right-click the sketch and select Edit Sketch.
- Click Trim Entities (Sketch toolbar) or .
- In the PropertyManager, under Options, select Power trim .
- Select anywhere along the sketch entity to extend.
- Click and drag the pointer as far as you want to extend the sketch entity.
- Release the pointer when finished extending the sketch entity, then click .
Video: Power Trim - Extend