Question

write condition for it pairs of lines are parallel​

Answer 1

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Two straight lines represented by the equation ax2 + 2hxy + by2 + 2gx + 2fy + c = 0 are parallel if it satisfies one of the condition given below. If two lines are parallel, then the angle between them will be 0. If two lines are parallel, then the angle between them will be 90 degree.

Answer 2

Answer:

Two lines are parallel only if when they do not intersect each other.

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