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A straight line connecting two points on a curve.
A straight line connecting two points on
a circle would be a chord.
Segment with end point on
A chord is a line segment that joins two points on a curve. In geometry, a chord is often used
to describe a line segment joining two endpoints that lie on a circle. The circle above contains
chord AB. If this circle was a pizza pie, you could cut off a piece of pizza along chord AB. By
cutting along chord AB, you are cutting off a segment of pizza that includes this chord.
In other words, a chord is basically any line segment starting one one side of a circle, like
point A in the picture above, and ending on another side of the circle, like point B. Points A and
B are the endpoints of chord AB.