![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/CIRCLE_LINES-en.svg/640px-CIRCLE_LINES-en.svg.png&w=640&q=50)
Chord (geometry)
Geometric line segment whose endpoints both lie on the curve / From Wikipedia, the free encyclopedia
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This article is about the line segment defined on a curve. For other uses, see Chord (disambiguation).
A chord (from the Latin chorda, meaning "bowstring") of a circle is a straight line segment whose endpoints both lie on a circular arc. If a chord were to be extended infinitely on both directions into a line, the object is a secant line. The perpendicular line passing through the chord's midpoint is called sagitta (Latin for "arrow").
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/CIRCLE_LINES-en.svg/320px-CIRCLE_LINES-en.svg.png)
More generally, a chord is a line segment joining two points on any curve, for instance, on an ellipse. A chord that passes through a circle's center point is the circle's diameter.