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1. The length of its radius 23 inches.

   In geometry, a disk (also spelled disc) is the place in a plane bounded by using a circle. A disk is stated to be closed if it consists of the circle that constitutes its boundary, and open if it does now not.

   The disc turned into a round, flat item that Greek athletes would throw for distance in the course of the ancient Olympics, a wearing culture that continues within the present day Olympics with the spelling disc. The disc became a beneficial object of evaluation for some thing having a spherical, flat shape being referred to as a disc or disk.

   Efficiently speaking, a circle has no region (it’s far simply the brink), however a disc does. however in practice human beings think about a circle as the brink or the enclosed space, or both. A disc is “closed” when it includes the bounding circle, and open if it does no longer.

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