I'm trying to create a football-shaped object by rotating an arc of a circle about a line.  Is there a way to define an arc in Maple?  I've been using the 3D Geometry package but I can switch to another if I need to.  I know I can calculate the arc length, but is there a way to define the arc itself as an object?  Eventually, I'd like to have the rotation of the arc and find the intersection between the rotation and another line.

Thanks for your help,

Michael