a project size information relate to zero or pi or co-ordinate geometry or Euclid's geometry?

Answer 1

I'm not sure what 'project' you are referring to, but assuming it is a building project or a surveying project of some sort, then of your answers:
a) zero
b) pi
c) co-ordinate geometry
d) Euclid's geometry

I'd have to say most projects would relate most to Euclid's geometry, needing to know lengths, angles, etc. Coordinate geometry, pi and zero are used, but underlying it all is Euclidean Geometry.

So the answer is:
d) Euclid's geometry