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]?

Solution for Part 1:

A sphere with a spherical void in it.

Not sure about part 2.

Posted by jonathan horvat on 2006-08-10 22:10:05