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Math Help - Help Urgent

  1. #1
    Senior Member
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    Help Urgent

    Is there a formula of finding the area of a triangle given three sides? Aside from using the law of cosine?

    Aside from
    1/2 a c sinB
    1/2 a b sinC
    1/2 b c sinA

    given sides a,b,c = ???
    i only need a formula
    help!
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by ^_^Engineer_Adam^_^
    Is there a formula of finding the area of a triangle given three sides? Aside from using the law of cosine?

    Aside from
    1/2 a c sinB
    1/2 a b sinC
    1/2 b c sinA

    given sides a,b,c = ???
    i only need a formula
    help!
    Its Heron's formula:

    Put s=\frac{1}{2}(a+b+c), then area:

    A=\sqrt {s(s-a)(s-b)(s-c)}

    RonL
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  3. #3
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    Thanks agen captain!
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