Linked from
The 22 pages that link to Chord, each with the reason it gives.
Thales' theoremRelated: The two sides meeting at the semicircle's point are chords.
Radical axisRelated: When two circles intersect, their common chord lies on their radical axis.
Law of sinesRelated: Every triangle side is a chord of its circumcircle.
Tangent–secant theoremRelated: The secant’s portion inside the circle is a chord.