## anonymous one year ago What does perpendicular mean?

1. anonymous

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.

2. anonymous

Ok thank you :)

3. anonymous

Np :)

4. SolomonZelman

|dw:1436457693831:dw|

5. SolomonZelman

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)

6. SolomonZelman

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

7. SolomonZelman

THis perpendicular line can be shifted any number of units up or down.

8. SolomonZelman

Why? because|dw:1436457991582:dw|and perpendicularity doesn't change