# Thread: Who first gave algebraic proofs of a circle?

1. ## Who first gave algebraic proofs of a circle?

Just out of curiosity does anyone know who first described a circle in algebriac terms? ie: $(x-h)^2+(y-k)^2=r^2$I'm being asked to give a mathematical decription of a circle.

2. Originally Posted by EyesForEars
Just out of curiosity does anyone know who first described a circle in algebriac terms? ie: $(x-h)^2+(y-k)^2=r^2$I'm being asked to give a mathematical decription of a circle.
Probably either Rene Descrates or, my hero, Pierre Fermat.
I say this because they were the first to invent the idea of analytic geometry.