12.6
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surface area of a sphere
SA=4πr²
center of a sphere
The point inside a sphere that is the same distance from every point on the sphere.
volume of a sphere
V=4/3πr³
hemisphere
half of a sphere
great circle
A circle on a sphere such that the plane containing the circle passes through the center of the sphere
diameter of a sphere
a segment passing through the center, with endpoints on the sphere
chord of a sphere
a segment whose endpoints are on the sphere
sphere
a three-dimensional closed surface such that every point on the surface is equidistant from the center
radius of a sphere
the distance from the center of a sphere to any point on the spherical surface
