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True or False

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Either Standard Form of an Equation or Translated Form of an Equation can be used no matter where the center of the circle is located.

asked Aug 13, 2014 in PRECALCULUS by swatttts Pupil

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It is true

When the circle's center is at the origin, the formula is x²+y²=r².

When circle's center is at the (h,k),the formula is (x-h)2 + (y-k)2 = r2

We subtract these from x and y in the equation to translate ("move") the center back to the origin.

If you compare the two formulae, you will see that the only difference is that the h and k variables are subtracted from the x and y terms before squaring them:

Basic equation :x^2+y^2=r^2.

General equation:(x-h)2 + (y-k)2 = r2

 

answered Aug 13, 2014 by bradely Mentor
selected Aug 13, 2014 by swatttts

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