Chord

Written by Jerry Ratzlaff on . Posted in Geometry

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Formula

\(c_l = 2r \sin \frac {c}{2} \)

\(c_l = 2 \sqrt {r^2-d^2} \)

Where:

\(c_l\) = chord length

\(r\) = radius

\(c\) = the subtended angle at the center of the chord

\(d\) = the perpendicular distance from the chord to the circle center

\(\sin\) = sine

\(\sqrt a\) = square root