# math

posted by .

What is the equation of a circle with its center at (0,3) and a diameter of 6?

• math -

• math -

I need the equation of the circle.
a. x^2+(y+3)^2=9
b. x^2-(y-3)^2=9
c. x^2+y^2-6y=0
d. x^2+(y-3)^2=0
e. x^2+(y-3)^2=36
I don't know where to go from here.

• math -

## Similar Questions

1. ### math

Write an equation of a circle with the center (-5,-4) and radius 6. The general equation for a circle is (x-a)^2 + (y-b)^2 = r^2, where r is the radius of the circle and (a,b) are the (x,y) coordinates of the center. Make the appropriate …
2. ### algebra

1)Write an equation for the parabola with focus (1,3)and vertex(0,3) answer= x= 1/4(y-3)^2 2)Write an equation for a circle if the endpoints of a diameter are at (1,1)and(1,-9) answer= (x-1)^2+(y+4)^2=25 3)Which is the equation of …
3. ### math

-a circle with center at the point O(0,0) also has the point P(-2,3) on it. The equation of this circle is?
4. ### Math

The points (4, –5) and (– 4, 1) are endpoints of a diameter of a circle. (a) Find the center of the circle. (b) Find the length of the radius of the circle. (Note that this is a distance.) Give the exact answer. Show work. (c) …
5. ### math

What is the equation of a circle with its center at (0,3) and a diameter of 6. Answers: a. x^2+(y+3)^2=9 b. x^2-(y-3)^2=9 c. x^2+y^2-6y=0 d. x^2+(y_3)^2=0 e. x^2+(y-3)^2=36
6. ### Calculus

Points (–1, 6) and (–3, 2) are endpoints of the diameter of a circle. (a) What is the exact length of the diameter?
7. ### GEOMETRY

The diameter of a circle has endpoints P(–10, –2) and Q(4, 6). a.Find the center of the circle. b.Find the radius. If your answer is not an integer, express it in radical form. c.Write an equation for the circle.
8. ### geometry

Name the diameter, radius, center, and the equation of the circle with a diameter that has endpoints at (-3, 4) and (5, -2).
9. ### geometry

2. For the circle with equation (x – 2)2 + (y + 3)2 = 9, answer each question: a) What are the coordinates of the center?
10. ### geomtry

A diameter of a circle has endpoints P(-10,2) and Q(4,6) a. find the center of the circle. b. find the radius of your answer is not an interger express in radical form c. write an equation for the circle

More Similar Questions