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    Mathematics
    Grade9
    Easy

    Question

    Find the perimeter of the shaded region.

    1. 21.42    
    2. 24.56    
    3. 20.56    
    4. 22.48    

    hintHint:

    perimeter of shaded region = complete perimeter - perimeter of unshaded region

    The correct answer is: 21.42

      Arc length = (fraction numerator 90 over denominator 360 end fraction) cross times circumference = (fraction numerator 1 over denominator 4 end fraction) cross times 2 cross times 3.14 cross times 3 = 4.71
      Perimeter = 6 + 6 + 2cross timesarc length = 12+2cross times4.71 = 21.42

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