noun
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geometrya line segment whose two endpoints lie on a circle (or, more generally, a curve)."the chord AB connects two points on the circle."
A chord is a line segment whose two endpoints lie on a circle, or more generally on any curve.
A chord that passes through the center of the circle is a diameter, the longest possible chord.
A circle is a basic shape used throughout mathematics. A circle is defined as a shape where every point along its perimeter is an equal distance from its center.
An inscribed angle is an angle whose vertex lies on a circle and whose two sides are chords of the circle.
The inscribed angle theorem states that an inscribed angle is equal to one-half the central angle that subtends the same arc.