Question

What would be the correct first step in this proof?
*Is it C?

Answer 1

In Geometry, two shapes are Similar when the only difference is size (and possibly the need to turn or flip one around).

The definition of a circle is that all points lie a fixed distance r from a given point C

Answer 2

So would choice C accurately fit into this proof?

Answer 3

It seems trivial to me - not sure what all the options mean.

All circles are similar - there is only 1 dimension to define them

Answer 4

Well thanks for your help anyways :)