Line segment that joins two points of an arc.

### Examples

- Segment
*FG*in the illustration is a chord.

Segment*AD*is also a chord. It is the longest chord in the circle. It is called a diameter. - Chord
*AB*is a chord of this arc of a curve.

- Chord
*BC*is a chord of this parabola.

In a conic section, any chord that passes through the focus is called a**focal chord**.

In the figure above, chord*AB*is a focal chord, as it passes through the focus*F*. The focal chord that is perpendicular to the axis of symmetry of the parabola is called the latus rectum.