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Complex Numbers: Parallel/Collinearity Condition

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Explanations 1

How do we know if two segments AB,CDAB,CDAB,CD are parallel? Let a=A,b=B,c=C,d=Da=A, b=B, c=C, d=Da=A,b=B,c=C,d=D be complex numbers. Translate AB,CDAB, CDAB,CD so a, c are at t…
By Vincent Huang