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Q: When is a line perpendicular to a plane?

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I believe the answer is "perpendicular line". Forgive me if I'm wrong :)

Two lines are said to be perpendicular when they are at right angles. That means that the angle between them is 90 degrees.There are other meanings of perpendicular; for example, a line is said to be perpendicular to a plane when it is perpendicular to EVERY line of the plane that goes through the intersection.

A line that is perpendicular to the segment of a plane and passes through the midpoint.

NO. Perpendicular lines in the same plane alwaysinthersect.

No

No, that is not true.

Yes they are. It's a postulate: In a plane two lines perpendicular to the same line are parallel.

The horizon runs horizontal. Perpendicular to that is VERTICAL.

orthographics means line is perpendicular to the view plane,while oblique means line is not exactly perpendicular to the view plane.

There's no such thing as one perpendicular line. "Perpendicular" tells the relationship between two lines, or between a line and a plane. Two lines are perpendicular if they form a 90-degree angle where they cross.

orthographics means line is perpendicular to the view plane,while oblique means line is not exactly perpendicular to the view plane.

draw a perpendicular line on a plane

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