Question

What is the general equation of a circle.Derive it.

Answer 1

area of a circle = πr^2
Parameter of circle = 2πr
Diameter = r/2
The equation of a circle comes in two forms:
1) The standard form: (x - h)2 + (y-k)2 = r2
2) The general form : x2 + y2 + Dx + Ey + F = 0, where D, E, F are constants.

Answer 2

the center radius form of the ○ equaton is in the format (x – h)2 + (y – k)2 = r2 with the center being at the point (h, k) n the radius being r. this form of the equation is helpful since u can easily find the ○ n the radius