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In a circle of radius 12cm a chord is drawn 3cm from the centre. Calculate the angle subtended by the chord at the centre

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Graciana

  1. Draw the circle and chord.
    Draw a radius perpendicular to the chord.
    You can see that
    cos(θ/2) = 3/12

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    oobleck

  2. calculate the angle and findthe area of the sector

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    In a circle of radius12cm a chord is drawn 3cm from the center

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