Question
A circle has radius 13 cm. A chord is 10 cm long. What
is the perpendicular distance from the centre to the chord?Solution
Perpendicular from centre bisects chord. Half of chord = 10/2 = 5 cm Using right triangle: distance2 Â + 52 = 132 distance2 = 169 - 25 = 144 distance = 12 cm
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