Extend to Face
Use Extend to extend a line segment to the plane represented by a facet (of an object).
Note: The plane must not be parallel with the line segment.
-
Select the line segment with
(line selector) to be extended. -
Right-click on the line and navigate to
Edit then select 
Extend Line to Face....The cursor changes to the facet selector and the Select
facet prompt appears. -
Click on desired facet. The line segment is extended.
Example of selecting a line segment.
Example of selecting a face to extend to.