2017 China TSTST Day 1 Problem 1
Source: 2017 China TSTST Day 1 Problem 1
March 7, 2017
geometryTststsolid geometry3D geometryoctahedron
Problem Statement
Find out the maximum value of the numbers of edges of a solid regular octahedron that we can see from a point out of the regular octahedron.(We define we can see an edge of the regular octahedron from point outside if and only if the intersection of non degenerate triangle and the solid regular octahedron is exactly edge .