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The radius of a circle is 8centemetre and the length of one of its chords is 12centemetre.find the distance of the chord from the centre.

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Did you make a sketch ?
Draw a perpendicular from the centre to the chord and you have a right-angled triangle.

h^2+ 6^2 = 8^2
h^2 = 64-36 = 28
h = √28 cm

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