Perpendicular
Definition

Lines are perpendicular if they intersect at right angles (90°) to each other.


Perpendicular lines

Real World Examples
http://www.clipart.com_Filename:040501_1952_2470_a_s.thb.jpg http://www.clipart.com_Filename:19282610.jpg

Demonstration
Image only

Instructions text as in global.js

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