A perpendicular line runs into or connects with another line at a right angle.
A perpendicular side is a side that forms a 90 degree angle (think of a perfect cross or T)
Two lines are perpendicular when the angle between them measures 90 degrees.
Mean? Runs along the same path as. Can not cross over. A road way with a median. The roads run perpendicular to each other.
I want know about human anatomy