Algebra..

Write the standard form of the equation of the circle with the given center and radius.


1. center (-2, 0) and r = 3

  1. 👍
  2. 👎
  3. 👁
  1. The standard form equation of a circle:

    ( x - h ) ^ 2 + ( y - k ) ^ 2 = r ^ 2

    h are the x coordinate of the center of the circle.

    k are the y coordinate of the center of the circle.

    r = radius

    In this case:

    h = - 2

    k = 0

    r = 3

    So equation of a circle :

    ( x + 2 ) ^ 2 + y ^ 2 = 9

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. 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.

  2. geometry

    Write the standard equation for the circle center (-6,-8), that passes through (0,0). I know that the formula would leave the 1qstr part as (x+6)+(y+8) I'm not sure about the radius when it goes through (0,0)

  3. algebra

    A few more question Id like for someone to check please. 1) what are the vertex, focus, and directrix of the parabola with the given equation? x^2-8x-28y-124=0 vertex (4,-5) focus (0,7) directrix y=-12 2) write an equation of a

  4. Geometry

    Write the equation of circle O centered at origin that passes through (9,-2) Circle B with center (0,-2) that passes through (-6,0) >For circle B, is the radius 6 in this case? So equation would be x^2+(x+2)^2=36, correct? If this

  1. NEED MAJOR HELP! *QUADRATIC EQUATIONS*

    Write the equation for the circle with center at (- 8, - 6) and radius of 10. (x+8)² + (y + 6)² = 10 (x+8)² + (y + 6)² = 100 (x-8)² + (y - 6)² = 100 Find the standard equation for the circle with center on the positive

  2. 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

  3. Alg/Trig

    Write an equation of a circle with center (2, 3) and radius 4.5.

  4. Geometry

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

  1. math

    4x^2+4y^2-16x-24y+51=0 is the equation of a circle. where is the center of the circle and what is it's radius? A. center (2,3) radius=1/4 B. center (2,3) radius=1/2 C. center (-2,-3) radius=1/4 D. center (-2,-3) radius=1/2

  2. math

    Write the standard form of the equation of the circle x^2+y^2+4x-2y-20=0. Find the center and radius. How do I do this? pleaaase help.

  3. Algebra

    Write an equation of a circle with the given center and radius. center (-7, -6) and radius 2. A. (x+7)^2+(y+6)^2=4 B. (x-7)^2+(y-6)^2=2 C. (x+7)^2+(y+6)^2=2 D. (x-7)^2+(y-6)^2=4

  4. math

    Rewrite the following equation in the center-radius form of the equation of a circle. x2 - 2x + y2 + 2y - 2 = 0

You can view more similar questions or ask a new question.