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Math Help - triangle proof

  1. #1
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    triangle proof

    have to make these to formulas equal each other

    Area of a triangle= 1/2 bc sinA

    Area of a triangle= 1/2 bh

    i figures out one step:

    Make both equations equal each other::: 1/2 bh = 1/2 bc sinA

    i have to figure out how to break it down to prove they are equal....
    Last edited by its.all.up.2.u; December 1st 2008 at 03:52 PM. Reason: i am to do a proof to show that both equations are equal......
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  2. #2
    Senior Member vincisonfire's Avatar
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    From the definition of sin(a) you can find that h=csin(a) .
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  3. #3
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    Quote Originally Posted by its.all.up.2.u View Post
    have to make these to formulas equal each other

    Area of a triangle= 1/2 bc sinA

    Area of a triangle= 1/2 bh

    i figures out one step:

    Make both equations equal each other::: 1/2 bh = 1/2 bc sinA
    now i am stuck
    I don't understand what you're asked for...

    You're asked to make them equal to each other.

    They both give the area of a triangle.

    Therefore they are equal...
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