1. What 3D objects are represented by a pair of concentric circles in its plan (viewed from above) and a pair of concentric circles for its front elevation (vertical face)?

2. What would a #1 object be if it also has a side elevation that is concentric squares [with corner diagonals]?

The inner circle could be much smaller than the outer circle.

 

Posted by Salil on 2006-08-03 08:15:28