Points A(0,8), B(12, -8), C(-12,-8)

Slope of AB is

Slope of BC is is 0

Slope of AC is

Perpindicular formula:

m1 and m2 must not be = 0

Finding the perpindicular of to point (12, -8)

Let m1 =

Solve for b

Let (x,y) = (12, -8)

Subtract both sides:

Equation:

Now for and (-12, -8)

is

What else I need to do to get the Orthocenter of the triangle?