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September 22, 2014

September 22, 2014

Posted by **Knights** on Tuesday, March 5, 2013 at 9:38am.

- Analytic geometry - finding point by intersect lin -
**Steve**, Tuesday, March 5, 2013 at 10:46amThe details get a bit messy, but you can place A=(0,0) B=(h,k) C=(m,n)

Then the altitude from B to AC is

y-k = -h/k (x-h)

The altitude from C to AB is

y-n = -m/n (x-m)

solve for x and y.

Trilinear coordinates are much cleaner, but less well known.

- Analytic geometry - finding point by intersect lin -
**Knights**, Tuesday, March 5, 2013 at 11:13amthanks a bunch

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