what is chord
Achordof acircleis ageometricline segmentwhose endpoints both lie on the circle. Asecantor asecant lineis the line extension of a chord. More generally, a chord is a line segment joining two points on any curve, such as but not limited to anellipse. A chord that passes through the circle's center point is the circle's diameter.
Among properties of chords of acircleare the following:
- Chords are equidistant from the center only if their lengths are equal.
- A chord that passes through the center of a circle is called a diameter, and is the longest chord.
- If the line extensions (secant lines) of chords AB and CD intersect at a point P, then their lengths satisfy APPB = CPPD (power of a point theorem).
The area that a circular chord "cuts off" is called acircular segment.
Chord is from the Latin Chorda meaning Bowstring.
The red segmentBXis achord(as is the diameter lineAB).
A chord is a line segment whose endpoints lie on the circle. A diameter is the longest chord in a circle. A tangent to a circle is a straight line that touches the circle at a single point, while a secant is an extended chord: a straight line cutting the circle at two points.
A straight line connecting two points on a curve.Example: a straight line connecting two points on a circle's circumference would be a chord.When the chord passes through the center of a circle it is called the diameter.
in this image ab is the chord