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?