Maths

A chord 6.6m long is 5.6m from the centre of the circle.find the radius of the circle.

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  1. Make a sketch.
    the line from the centre hits the chord at its midpoint and you have a right-angled triangle.

    You can use Pythagoras.

    r^2 = 3.3^2 + 5.6^2 = 42.25
    r = √42.25 = 6.5

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