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It means it's 48 times smaller than the original.
Yes, if I'm not mistaken, you multiply your intended diameter by a coefficient (number). It's one operation for the base of all the triangles and one for the height (so to speak) or each triangle in both the pentagons and the hexagons. So it'd be 3 operations you need to do, to know all the sides of all the triangles. Don't remember those coefficients, but a search on-line can solve the problem or the library. Hope that helps.
I' sorry about that. Why don-t you try again. maybe you did something wrong.