Malaysia IMONST 1 Senior P12
Source:
September 18, 2020
pentagonhexagon
Problem Statement
A football is made by sewing together some black and white leather
patches. The black patches are regular pentagons of the same size. The white
patches are regular hexagons of the same size. Each pentagon is bordered by 5
hexagons. Each hexagons is bordered by pentagons and hexagons. We need pentagons to make one football.
How many hexagons are needed to make one football?