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Thread: From Altitudes to Angle to Sides

  1. #1
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    From Altitudes to Angle to Sides

    From Altitudes to Angle to Sides-potw.pngI dont know where to start
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  2. #2
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    Re: From Altitudes to Angle to Sides

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  3. #3
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    Re: From Altitudes to Angle to Sides

    In most cases the altitude of the triangle is inside the triangle, like that image example
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    Re: From Altitudes to Angle to Sides

    AB = c, BC = a, AC = b

    24 b = 56 c = 21 a = twice area ABC

    solve for b, c in terms of a and replace in

    a^2+c^2-2 a c \cos  B=b^2

    we get

    \cos  B=1/2
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