Chord Length of a Circle Formula

A line segment formed by joining any two points in an arc is chord. In a circle, the chord that passes through the center of the circle is the largest chord and it is the diameter also. The formula for the length of the chord is derived from the circle radius and the perpendicular distance from the chord to the mid center of the circle.

Formula:

chord length
Chord length = 2r2 - d2
where,
r = radius of the circle
d = perpendicular distance from the chord to the circle center

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