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For a real particle of an equilateral triangular shape of 1 mm thickness and edge length...

For a real particle of an equilateral triangular shape of 1 mm thickness and edge length of 2 mm:
Calculate the:
a) Diameter of the surface to volume equivalent sphere, xsv
b) The sphericity, ?
c) The equivalent circle diameter(s) of the possible 2-D projection areas of the particle.

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