[Doctor Stochastic]

You haven't studied topology much; at least by what you have been posting. Thus, your mistake about the circle. A circle is a one-dimensional object of constant curvature. There is no straight line joining any two points as you were claiming.

All this goes back to Gauss (and later Riemann.)

[MacDorcha]

then please, explane a radius. thats part of a circle. and it has two points. or better yet, a diameter. how does one find the dimensions of a circle? gee... pie times the raidus.... squared i think.... yes, it's squared. and becuase you use it, it is part of it. keep trying though, your attempt shows how long you've been out of school.