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Tyro
Asked: 2020-12-20T15:15:45+00:00 In:

what is the length of the arc?

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An arc of a circle of radius 5.6cm subtends an angle of 45^{0} at the centre of the circle. If \Pi =\dfrac{22}{7}, what is the length of the arc?

circlelength of arc

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  2. Sengemegz
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    Length of arc=\dfrac{\theta }{360}\times 2\Pi r
    \theta =45^{0},r=5.6cm, \Pi =\dfrac{22}{7}\Rightarrow l=\dfrac{45}{360}\times 2\times \dfrac{22}{7} \times 5.6
    \Rightarrow l=\dfrac{1}{8}\times\dfrac{246.4}{7}
    \Rightarrow l=\dfrac{246.4}{56}
    \therefore l=4.4cm

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