Is the sum of the squares of two opposite sloping edges of a rectangular based pyramid equal to the sum of the squares of the other two sloping edges? Is it true that p 2 +q 2 =s 2 +r 2 In 2 dimensions, where the rectangle ABCD and the point V are in the same plane? In 3 dimensions, where the diagram represents a pyramid, with vertex V, on a rectangular base ABCD?