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07-05-2017
Mathematics

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A 0.90 m wide door turns though an angle of 45°. How long is the arc of the displacement?

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Аноним Аноним

07-05-2017

L = r * C where L = length of the arc , r = radius of circular path and C is the angle turned through, in radians.

So we have length of arc = 0.90 * 45 * pi/180
= 0.71 m to nearest hundredth of a meter.

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