1. Equation of a Circle

2. Equation Where the center of the circle is (h, k) and r is the radius.

3. Example Write the equation of a circle whose center is at (3, 2) and whose radius is 8.

4. Example Write the equation of a circle whose center is at (-4, 1) and whose radius is 3.

5. Example

6. Given the equation Identify the center and radius of the circle

7. Example Given the equation Graph the circle

8. Example Find the equation of the circle whose center is at (-2, 4) and passes through the point (1, 8).