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Math Help - [SOLVED] Need help please

  1. #1
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    [SOLVED] Need help please

    i have a math problem where i need to find the area of a scalene triangle. i dont know how to find the area because i dont have the height, i just have the dimensions:330,270 and 240. Help would be much apreciated.
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  2. #2
    Member classicstrings's Avatar
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    I think you can use the cos rule then sin rule for area of triangle.

    cosA = (330^2 + 270^2 - 240^2 )/ (2 * 330 * 270)

    Then use the angle value in this.

    0.5 * 330 * 270sin(A) = Area of triangle.
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  3. #3
    Grand Panjandrum
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    Quote Originally Posted by robmaster View Post
    i have a math problem where i need to find the area of a scalene triangle. i dont know how to find the area because i dont have the height, i just have the dimensions:330,270 and 240. Help would be much apreciated.
    Use Heron's formula: if a, b, c are the sides of a triangle let s=(a+b+c)/2,
    then the area is:

    A=sqrt[s(s-a)(s-b)(s-c)]

    RonL
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