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By nerd, 13 years ago, translation, In English
Equation of a line in two dimensional plane is ax + by + c = 0

How to find coefficients {a, b, c}?

We can find them by simplifying and modifying this:


after:

(x - x1)(y2 - y1) = (y - y1)(x2 - x1)

x(y2 - y1) - x1(y2 - y1) = y(x2 - x1) - y1(x2 - x1)

(y2 - y1) * x + (x1 - x2) * y + y1(x2 - x1) + x1(y2 - y1) = 0

a = y2 - y1
b = x1 - x2
c =  - by1 - ax1

It is all...
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13 years ago, # |
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Good solution!!!
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