A chord 12cm long is at a distance of 8cm from the centre of a circle. Its radius is

10 cm

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9 cm

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7 cm

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12 cm

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Solution

The correct option is A
10 cm

The perpendicular distance between the centre of the circle to the chord = 8cm

The line droped from centre of the circle to the chord bisects it.

Radius = $\sqrt{8^{2} + 6^{2}} = \sqrt{100} = 10 c m$

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