Diameter
a line segment whose endpoints are on the circle and passes through the center of the circle
Diameter is a metric used to describe the length of a straight line that passes through the center of a circle or a sphere and touches two points on its circumference. In other words, it is the length of the line segment that comes from one side of a circle, goes through the center, and ends on the other side of the circle.
The diameter is one of the essential metrics of a circle since it directly affects its circumference, area, and radius. The diameter of a circle is always twice the length of its radius, which is the distance between the center of the circle and any point on its circumference. It is expressed as the distance, usually in units of length, such as centimeters, meters, or inches.
The diameter of a sphere, such as a ball, is also the line segment that passes through the center of the sphere, and it is expressed in the same units, like the diameter of a circle. It is also twice the radius of the sphere.
In summary, diameter is the length of a line segment that passes through the center of a circle or sphere and connects two points on its circumference.
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