Practice with
Circle Equations
Topic Index | Algebra2/Trig Index | Regents Exam Prep Center


Solve the following problems dealing with equations of circles.

1.

Convert this equation into center-radius form.  State the coordinates of the center of the circle and its radius.

                     

 

 

2.

State the equation of a circle in general form which has a center at (5, -3) and a radius of 9.   

 


 

3.

Convert this equation into center-radius form.  State the coordinates of the center of the circle and its radius.  Graph.  

                    

 


 

4.

Write the center-radius equation of a circle with a center at (-3, -6) and passes through the point (-4, 8).

    

 


 

5.

Write the general equation of a circle that is tangent to the x-axis, with a center located at (4, -6).

    

 


 

6.

Write the center-radius equation of the circle whose graph is shown below.
           

 

 

 

7. Write the general form equation for the circle whose graph is shown at the right. 

List 6 points that lie on this circle.