Re: create a plane 90 degree to another one I just created
you need to use your angled plane and then an edge or axis. After selecting the plane and edge/axis you select Normal in the Datum Plane properties. Using an edge the 90deg plane is forced to follow the feature that created the edge. Using an axis the 90deg plane will go thru the axis. If you then move the axis the plane will follow.
In the picture the top most plane is following the edge of the extruded feature and the bottom most plane is following the axis i have created.