Question
Show that an equation of the sphere with radius $r$ and center $\mathbf{S}\left(x_1, y_1, z_1\right)$ is $\left(x-x_1\right)^2+\left(y-y_1\right)^2+\left(z-z_1\right)^2=r^2$.
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A sphere is the set of all points that are a fixed distance (the radius) from a central point (the center of the sphere). Show more…
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