I have been playing around on a bunch of programs with stealth planes and their general shape. I know that they are required to be flat and have some sort of special material/paint on to 'absorb' the radio waves.
But I have been pondering about the required shape of these aircraft and why the flying wing shape is so widely used (excluding its lift efficiency). Why not some other shape, like a tilted square, triangle, or even a sphere? What makes the general shape of the B-2 and F-117 so common in the design of stealth aircraft?