Diameter
A chord that goes through the center of the circle
Diameter is a straight line segment that passes through the center of a circle and connects two points on the circumference of a circle. It is the longest distance of a circle, and it divides the circle into two equal parts which are called hemispheres. The length of the diameter of a circle is equal to twice the radius of the circle. The diameter is an important measurement in geometry and is used to calculate other measurements of the circle, such as the circumference, area, and volume.
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