For the hexagon, unless I'm reading CRG's wrong, both those are equations give pretty different results. His is side^2 * 3 * 2.5 = area. Yours is side^2 * 2.6 = area. So am I reading an extra * 3 in CRG's, or am I missing a * 3 in yours? :confused:
Thanks for that info on Coal, Tilla. I was...