Math Homework. Do It Faster, Learn It Better.
Chord
A chord of a circle is a line segment with both endpoints on the boundary.
In the figure, and are chords of the circle.
A diameter is a chord which passes through the center of the circle and is the longest possible length for that circle.
Some basic theorems involving chords:
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In the same circle or in congruent circles, two minor arcs are congruent if and only if their corresponding chords are congruent.
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In the same circle or in congruent circles, two chords are congruent if and only if they are equidistant from the center.