cindychen1 cindychen1
  • 23-06-2018
  • Mathematics
contestada

a circle is centered at (-3,2) and has a radius of 2. Which of the following is the equation for this circle?

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Luv2Teach
Luv2Teach Luv2Teach
  • 23-06-2018
You don't have any choices for this, but no matter.  We can figure it out anyway.  The standard form of a circle is [tex](x-h)^2+(y-k)^2=r^2[/tex], where h is the x coordinate of the center and k is the y coordinate of the center.  Our h is -3 and our k is 2, with r = 2.  Filling in, we have [tex](x-(-3))^2+(y-2)^2=2^2[/tex].  Simplifying we have [tex](x+3)^2+(y-2)^2=4[/tex].  That's the equation you're looking for.
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