Question

Two lines are perpendicular if
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Answer 1

Answer:

Two lines are perpendicular if angle between them is 90°

Answer 2

If two non-vertical lines in the same plane intersect at a right angle then they are said to be perpendicular. Horizontal and vertical lines are perpendicular to each other i.e. the axes of the coordinate plane. The slopes of two perpendicular lines are negative reciprocals.

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