The diameter of a sphere • 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. • is half the length of the radius.

The diameter of a sphere is the longest distance on a sphere. It is also the distance from the center of the sphere to any point on the surface of the sphere. However, it does pass through the center of the sphere. It is equal to twice the length of the radius.