Posted by Taylor 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  Henry, 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 = (71) / (153) = 6/12 = 1/2=slope
of BC.
m2 = 2/1 = 2 = Slope of altitude.
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