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Math Help - Resolve triangle

  1. #1
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    Resolve triangle

    The base of an isosceles triangle is 30cm and the angles formed by the base and the equal sides are 35 grades 35 minutes, how to get the other sides and angle?

    I'd be able to solve it if I'd have 2 sides, but with one side I'm confused.

    Thanks.
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  2. #2
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Patrick_John View Post
    The base of an isosceles triangle is 30cm and the angles formed by the base and the equal sides are 35 grades 35 minutes, how to get the other sides and angle?

    I'd be able to solve it if I'd have 2 sides, but with one side I'm confused.

    Thanks.
    Use the Law of Sines:
    \frac{sin(A)}{a} = \frac{sin(B)}{b} = \frac{sin(C)}{c}

    -Dan
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  3. #3
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    But I only have "a", "B" and "C". I only know how to use the law of sins when I have
    -"a" and "A"
    -"b" and "B"
    -"c" and "C"
    and another side or angle.

    Thanks
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  4. #4
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Patrick_John View Post
    But I only have "a", "B" and "C". I only know how to use the law of sins when I have
    -"a" and "A"
    -"b" and "B"
    -"c" and "C"
    and another side or angle.

    Thanks
    If you have a, B = C then you can use A + B + C = 180 to get the third angle.

    -Dan
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  5. #5
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    Thanks !
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