The center of a sphere is a line segment from the center point to the surface of the sphere. a fixed point equidistant from all points on the surface of the sphere. a three-dimensional circle in which all points are equidistant from a fixed point. the same as the base of the sphere.

A fixed point equidistant from all points on the surface of the sphere

Step-by-step explanation:

we know that

The sphere is the set of all points in the space equidistant from a fixed point called the center of the sphere

therefore

The center of a sphere is a fixed point equidistant from all points on the surface of the sphere

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step-by-step explanation:

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6