math grade 12

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What is the arc length if the central angle is 225 degrees and the radius of a circle is 3 cm?
pls help. i don"t get it

  • math grade 12 -

    Arc length = rθ ...(1)
    where r is radius and θ is central angle in radians.

    To convert 225° to radians, multiply by (π/180) to get 225π/180=5π/4

    Use formula (1) to calculate arc length, which should be in the same units as the radius.

  • math grade 12 -

    2*225*pie/360*3
    should be the answer;)

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