Radian measure and arc length

Radian measure and arc length


arc  length=rθ  radian arc\;length= r \cdot \theta\;radian
  • 1.
    Use the information in each diagram to determine the value of the variable
    Give your answers to the nearest hundredth of a unit.


    Using arc length and radius to calculate angle in radian


    using angle in radian to calculate arc length of a circle


    Using angle in radian and arc length to calculate radius


    Using angle in degree and radius to calculate arc length

  • 2.
    A 20 cm long pendulum swings through an arc length of 60 cm. Through
    what angle, in both degrees and radians, does the pendulum swing?

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