Perpendicular lines are defined as any two lines in the same plane that intersect each other to form atleast one 90 degree angle.
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Perpendicular lines are straight lines that intersect each other at right angles which is 90 degrees
lines that all the points on it have the same head pressure and eqipotential lines are always prependicular to the stream lines .
The walls of most buildings are perpendicular to the ground they are built on.
The depth of section is major axis of that section. Prependicular to that depth is minor axis of that section. I think it helps you to understand. Regards, Vinay
yes ithape ens only if the two vectors are perpendicular to eachothe we can equate their squares