Section of a regular tetragonal pyramid
Source: Sharygin contest. The final raund. 2008. Grade 10. First day. Problem 5
August 31, 2008
geometry3D geometrypyramidratiogeometry unsolved
Problem Statement
(I.Bogdanov) A section of a regular tetragonal pyramid is a regular pentagon. Find the ratio of its side to the side of the base of the pyramid.