The diameter of a sphere is a straight line segment that passes through the center of the sphere and has its endpoints on the surface of the sphere. It is twice the length of the radius of the sphere.
The radius of a sphere is a straight line segment that connects the center of the sphere to any point on the surface of the sphere. It is the shortest distance from the center to any point on the surface.
The longest distance on a sphere is a straight line segment called the "great circle distance" or "arc length," which is the distance along the surface of the sphere between two points. This distance does not necessarily pass through the center of the sphere.
The diameter of a sphere (1 point ) is half the length of the radius is the longest distance on a sphere . is the distance from the center of the sphere to any point on the surface of the sphere . does not pass through the center of the sphere .
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