Impossible. A pentagon, BY DEFINITION, has 5 sides so it cannot be 29 sided!
A 29 sided polygon is called icosikainonagon ( I think )
The name of a 29 sided polygon is Icosikaienneagon.
In geometry a 29 sided shape is referred to as an icosikaidigon. The shape closely resembles an 3 dimensional octagon.
The Pentagon site covers a total of 583 acres, while the building itself sits on 29 acres.
icosikaienneagon
29 is prime. No tree.
I think a icosikaienneagon or icosikainonagon
Like a half
Originating from one vertex there are 27 triangles
knowing that the outer wall is 921 feet and using A=(half)(apothem)(perimeter) you can determine the inside walls to be about 338 feet ... check my math though! if that be the case, then the inside pentagon has an area of 4.5 acres (use trig and formula above) ... google it and the Pentagon has an area of 29 acres ... 29+4.5 and you get 33.5 which is the are of a pentagon with side 921. hope this helps.
A 29-sided polygon.
Mail Call - 2002 The Pentagon 6-5 was released on: USA: 29 April 2005