cut triangle into 3 polygons - All-Russian MO 2003 Regional (R4) 8.4
Source:
September 17, 2024
geometrycombinatorial geometrycombinatoricsobtuse
Problem Statement
Prove that an arbitrary triangle can be cut into three polygons, one of which must be an obtuse triangle, so that they can then be folded into a rectangle. (Turning over parts is possible).