## Chord

### In mathematics, a chord is a line segment that connects two points on a curve

In mathematics, a chord is a line segment that connects two points on a curve. The term “chord” is commonly used in relation to circles, where it refers to a line segment that lies entirely within the circle and connects two points on the circle’s circumference.

To better understand a chord, it is helpful to know some related terms. The center of a circle is the point equidistant from all points on the circle. The radius is the line segment from the center to any point on the circle. The diameter of a circle is a chord that passes through the center, essentially dividing the circle into two equal halves.

The length of a chord can be calculated using the Pythagorean theorem or other geometric methods. In a circle, the length of a chord depends on its distance from the center and the angle it subtends at the center. The longer the distance from the center and the larger the subtended angle, the longer the chord will be.

Chords have several important properties:

1. The perpendicular bisector of a chord passes through the center of the circle. This means that if you draw a line perpendicular to the chord and passing through its midpoint, it will intersect the center.

2. The diameter is the longest possible chord in a circle, as it passes through the center and divides the circle into two equal parts.

3. Chords that are equidistant from the center are equal in length. This means that if two chords are equidistant from the center, they will have the same length.

4. The angle formed by two chords that intersect inside a circle is half the sum of the arcs they intercept. This property is called the intersecting chords theorem.

Chords are important in various mathematical applications, including geometry and trigonometry. They help in analyzing circle properties, calculating distances, and solving problems that involve circular shapes.

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