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14 March, 01:24

a chord of a circle 8 cm long subtends an angle of 120 degree at the center find the radius of the circle

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  1. 14 March, 02:03
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    Chord = 2 • sine (Central Angle) • radius

    radius = 8 cm / 2 * 0.86603

    radius = 4.6187776405 cm
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