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Discussion :: Mensuration

  1. The sector of a circle has radius of 21 cm and central angle 135o. Find its perimeter?
    2. A.
    91.5 cm
    B.
    93.5 cm
    C.
    94.5 cm
    D.
    92.5 cm
    E.
    None of these

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    Answer : Option A

    Explanation :

    Perimeter of the sector = length of the arc + 2(radius) 

    = (135/360 * 2 * 22/7 * 21) + 2(21) 

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