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Math Help - urgent triangle help!

  1. #1
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    Dec 2008
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    Question urgent triangle help!

    alright i am given the base of a trianlge but no side length, how do i find the height?
    the base = 34.64
    angle a= 30
    angle b=120
    angle c= 30

    if that helps?
    i dont know how to do it and i've been searching everywhere.
    please if you can help me and show me how it would be great! (Rofl)
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  2. #2
    Super Member
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    Jun 2008
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    Quote Originally Posted by cheerbaby94 View Post
    alright i am given the base of a trianlge but no side length, how do i find the height?
    the base = 34.64
    angle a= 30
    angle b=120
    angle c= 30

    if that helps?
    i dont know how to do it and i've been searching everywhere.
    please if you can help me and show me how it would be great! (Rofl)
    Extend a perpendicular line segment (which is the height) from the vertex to the base. Note that it bisects the base. Then use trigonometry:

    \tan{30} = \frac{h}{\displaystyle\frac{b}{2}}
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  3. #3
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    Dec 2008
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    thank you!

    i got 519.6
    isnt that too high of a number for it?
    it doesn't seem right?
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  4. #4
    Super Member
    Joined
    Jun 2008
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    Quote Originally Posted by cheerbaby94 View Post
    thank you!

    i got 519.6
    isnt that too high of a number for it?
    it doesn't seem right?
    Yep, it's not right. You made a computation mistake. Recheck it.
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