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| Math Central | Quandaries & Queries |
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Question from kanika, a student: equation of sphere and how to know its center |
Kanika,
The equation of the sphere with center $(a, b, c)$ and radius $r$ is
\[(x - a)^2 + (y - b)^2 + (z - c)^2 = r^2.\]
If you have an equation that is the equation of a sphere and you can put it in the form above then the center is $(a, b, c).$
I hope this helps,
Penny
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