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Math Help - area of semi circle?

  1. #1
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    Bristol, England
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    area of semi circle?

    hi i need to find the area of this:
    area of semi circle?-zzzzzzzzz.jpg
    im not sure how to do it because there isn't a radius there. if anyone can help and explain i will be very thankful!
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  2. #2
    Super Member
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    Oct 2008
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    Bristol, England
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    is 26 the diameter of the semicircle so i half it to make the radius so i would do, pie x 13 x13 to make the area of a circle then divide by 2 to make area of a semicircle?
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