exists cyclic quadrilateral, section of a pyramid with convex quadr. base?
Source: 2006 Oral Moscow Geometry Olympiad grades 10-11 p5
October 20, 2020
geometrycyclic quadrilateral3D geometrypyramid
Problem Statement
The base of the pyramid is a convex quadrangle. Is there necessarily a section of this pyramid that does not intersect the base and is an inscribed quadrangle?(M. Volchkevich)