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Posted by on Sunday, July 24, 2011 at 2:43pm.

if A(2,4) and B(3,1) and C(15,7) find the slope of the altitude from A to BC

  • Gemotry - , Sunday, July 24, 2011 at 8:15pm

    A(2,4) , B(3,1), C(15,7).

    The altitude is perpendicular to BC.
    Therefore, it's slope is the negative reciprocal of BC.

    m = (7-1) / (15-3) = 6/12 = 1/2=slope
    of BC.

    m2 = -2/1 = -2 = Slope of altitude.

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