I have been asked to help with this question and I don't get what it is asking. I have a good knowledge of solid shapes and plane shapes and Euler's Rule but don't get the link to the fractions question. Any ideas anyone?

For each of the following sums of reciprocals, state whether or not it corresponds to a regular or semiregular

tiling or a Platonic solid or Archimedean solid.

If it does, give the formal name of the tiling or solid and briefly explain (in just a few words) what the

name means. If it does not, state briefly why not.

a) 1/3 +1/12 + 1/12 =

j) 1/4 + 1/6 +1/0 =