Question

(x1,y1),(x2, Y2), and (x3.Yz), are collinear points if and only if



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Answer 1

Answer:

(x1, y1), (x2, y2) , and (x3, y3) are collinear points if and only if

[x1 y1 1 , x2 y2 1 , x3 y3 1] = 0