Parallel Vs Perpendicular. This lesson looks at the basic definitions of parallel lines and perpendicular lines as well as methods to prove that they are indeed parallel or. The word parallel comes from the greek term parallelos which means side by side. it is typically used to describe two things.
Let a = (ax , ay) and b = (bx , by).
The difference between a perpendicular line and a parallel line is that a perpendicular line crosses or a perpendicular line is a line that creates two 90 degree angles at the line, segment, etc. If you visualize a line with positive slope (so it's an increasing line), then the perpendicular line must have negative slope (because it will have to be a. By anna mette on feb 12, 2013. How to find the equation of a.
