SpaceClaim & Sketch Plane

[1260960796]

In SpaceClaim, If there is a straight line segment, how can I create a sketch plane(or say workplane) which is through an endpoint and perpendicular to the line segment?
What’s more, If the endpoint is shared by several line segment, the sketch plane result is sole when I place my cursor on the endpoint. That means the sketch plane is only perpendicular to one certain line segment that I can’t specify which line segment.

[1260960796]

Because I need create a section pattern in a plane which is perpendicular to the line and pull the pattern along the line.