What does perpendicular mean?
In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects. A line is said to be perpendicular to another line if the two lines intersect at a right angle.
Ok thank you :)
Np :)
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So, a line and its perpendicular line will always create four 90º angles. (it should like like an X or like a +, if you have a line and its perpendicular line drawn)
Now, as far as equations are concerned. For any line: y=mx+b , the prependicular line is going to be y=\(\displaystyle\small \rm \frac{-1}{m}\)x
THis perpendicular line can be shifted any number of units up or down.
Why? because|dw:1436457991582:dw|and perpendicularity doesn't change
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