What is a straight line? I need a geometric definition of it. The equation of a straight line is known to me.I am saying about a straight line of 2D plane.
What is a circle? I need a geometric definition of it. The equation of a circle is known to me.
I know there is an algebraic side and a geometric side in 2D geometry. I needed geometric explanation.And, I thought points make a straight line.Is it fine to think like that?