1. + Equation of a Circle

2. + Circle A Circle is a set of all points in a plane equidistant from a given point. The Center.

3. + Circle Equation Centered at the Origin: Centered at (h,k): (x,y) is any point on the circle (h,k) is the center point r is the radius

4. + Identifying the Center and Radius Find the Center and the Radius

5. + Identifying the Center and Radius Find the Center and the Radius

6. + Writing an equation of a Circle Given the center and the radius, write an equation of a circle. Center (-4,3) and radius 4

7. + Try Some! Given the center and the radius, write an equation of a circle.

8. + Try Some! Given the center and the radius, write an equation of a circle.

9. + Writing an Equation From a Graph

10. + Graphing Circles Graph the following circle.

11. + Completing the Square Use Completing the Square find the center and the radius!

12. + Completing the Square Use Completing the Square find the center and the radius!

13. + Completing the Square Use Completing the Square find the center and the radius then find Circumference and Area. x 2 + 2x + y 2 + 14y – 31 = 0

14. + Completing the Square Use Completing the Square find the center and the radius then find Circumference and Area. x 2 - 10x + y 2 + 4y – 7 = 0