if the length of a chord which is 8 cm away from the centre is 12 cm find the radius of the circle
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length of chord = 12 cm
half of chord = 12/2 = 6cm
distance from center=8 cm
radius = r cm
perpendicular from center of chord to center of circle = 8 cm
using Pythagoras theorem
r^2 = 6^2 + 8^2
r^2 = 36 + 64
r^2 = 100
r = 10cm
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