Polyhedrons.
http://wiki.answers.com/Q/What_geometric_shape_are...

A circle is a two dimensional shape. Equations for circles are of the form (x  h)2 + (y  k)2 = r^2 where h and k are the coordinates of the center of the circle. The center is at
http://www.ehow.com/info_8653986_equationsequalg...

Hello, I am not sure in what context you're talking about but as far as I have understood the question its answer is: Geometric Shapes are NOT copyrightable (such as, rectangles,
http://answers.yahoo.com/question/index?qid=200711...

Geometric shapes: triangle, quadrilateral, rectangle, square, parallelogram,
http://www.chacha.com/question/whatareallthege...
