Parallel & perpendicular lines intro (Full video)

Khan Academy

Supporting grades: 4

Description: Parallel lines never intersect, and perpendicular lines intersect at a 90 degree angle. Learn how to identify parallel and perpendicular lines. Created by Sal Khan. Perpendicular lines are two lines that intersect at a right angle. We would say these two lines are perpendicular if they intersect at a right angle.

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