Circle
A circle is the set of all points in a plane that are at a fixed distance from a fixed point called the center.
Definition
Standard Equation
Example: Standard Form
General Equation
Example: Finding Center and Radius
Point on a Circle
Practice Problems
- Write the equation of a circle with center and radius .
- Find the center and radius of .
- Check if lies on .
- Find the equation of a circle with center passing through .