Copyright © University of Cambridge. All rights reserved.
'Rectangular Pyramids' printed from http://nrich.maths.org/
Is it true that p ^{2} + q
^{2} = s ^{2} + r
^{2}
 in 2D, where the rectangle ABCD and the point V are in the same
plane?
 in 3D, where the diagram represents a pyramid, with vertex V,
on a rectangular base ABCD?

