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Sunshine447

  • 3 years ago

A circle is shown on the coordinate plane below. http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0802_07/image0034e849df3.gif What is the equation of this circle? x2 + (y + 1)2 = 4 x2 + (y – 1)2 = 2 x2 + (y + 1)2 = 2 x2 + (y – 1)2 = 4

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  1. Sunshine447
    • 3 years ago
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    @ParthKohli @Hero

  2. Sunshine447
    • 3 years ago
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    @ganeshie8

  3. Sunshine447
    • 3 years ago
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    I think it's the first one

  4. Sunshine447
    • 3 years ago
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    is it the first choice? I'm just double checking

  5. ganeshie8
    • 3 years ago
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    check again :)

  6. Sunshine447
    • 3 years ago
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    why is it the last one?

  7. Sunshine447
    • 3 years ago
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    wouldnt it be 2^2=4 so its the first one? Dont you have to add not subtract?

  8. ganeshie8
    • 3 years ago
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    general form of equation is : (x-h)^2 + (y-k)^2 = r^2 can you tell whats the center (h, k) and radus r, from the figure ?

  9. ganeshie8
    • 3 years ago
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    yeah radius you got it correct !!

  10. Sunshine447
    • 3 years ago
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    yes, the center is 0,1 and the radius is 2

  11. Sunshine447
    • 3 years ago
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    wait.... so which one is it?

  12. Sunshine447
    • 3 years ago
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    1st or last?

  13. ganeshie8
    • 3 years ago
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    center = (h, k) = (0, 1) (x-h)^2 + (y-k)^2 = r^2

  14. ganeshie8
    • 3 years ago
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    plug in h and k values

  15. ganeshie8
    • 3 years ago
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    (x-0)^2 + (y-1)^2 = 2^2 x^2 + (y-1)^2 = 4

  16. Sunshine447
    • 3 years ago
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    so the first one?

  17. ganeshie8
    • 3 years ago
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    does that help/make sense ?

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