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Let 'r' be the radius of a circle, h be the perpendicular distance from the centre of the circle to the chord then express length of chord in terms of r

and h



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OB=r(radius) and OM=h(given)
as we know perpendicular drawn from centre to chord bisects the chord
∴in ΔOMB [by pyth theorem]
AB=2BM{perpendicular drawn from centre bisect the chord}
length of chord will be 2√(r²-h²)
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hope it is helpful............
my pleasure
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