Radiate Surface
The Radiate
Surface 
tool creates a surface by radiating edges
of solids or surfaces along a selected planar direction.
To created
radiated surfaces:
Click Radiate Surface on the
Surfaces toolbar, or click Insert, Surface, Radiate.
In the
PropertyManager, under Radiate Parameters:
Select
a face or plane in the graphics area that is parallel to the direction
in which you want the surface to radiate for Radiate
Direction Reference.
The arrow in the graphics area points normal to the selected
reference, but the surface radiates parallel to the selected reference.
Select
an edge or a set of contiguous edges in the graphics area for Edges
To Radiate 
.
If
necessary, click Flip Radiate Direction
to radiate the surface in the opposite direction.
Select
Propagate to tangent faces if
the model has tangent faces and you want the radiated surface to continue
along those faces.
Set
Radiate Distance 
to determine the width of the radiated surface.
-
Click OK
.
