Coordinate Geometry · Classes 11, 12
Circle Equation
Circle with centre (h,k) and radius r.
FORMULA
\((x-h)^2+(y-k)^2=r^2\)
Worked example
Centre (0,0), radius 3 ⇒ x²+y²=9
Understand this formula
Circle with centre (h,k) and radius r.
Check measurement units, mathematical domains and rounding before applying any result in an examination.