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For any given line in 3D, there's an infinite family of lines that are perpendicular to it, namely all the lines that lie in the plane for which the line is the normal of.<BR><BR>The second ...
Perpendicular lines meet at a right angle. A right angle is a quarter turn, which is 90 degrees (90Ëš). Right angles are sometimes shown with a small square where the lines meet. Perpendicular ...
Perpendicular lines meet at a right angle. A right angle is a quarter turn, which is 90 degrees (90Ëš). Right angles are sometimes shown with a small square where the lines meet. Perpendicular ...
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