What is a chord but not a diameter

In geometry, a chord is often used to describe a line segment joining two endpoints that lie on a circle. A diameter satisfies the definition of a chord, however, a chord is not necessarily a diameter. This is because every diameter passes through the center of a circle, but some chords do not pass through the center. Thus, it can be stated, every diameter is a chord, but not every chord is not a diameter.

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