[color=#000000]The following applet demonstrates a property that parallel lines have when they're drawn in the coordinate plane. [br] [i] [br]Be sure to move the [color=#1e84cc][b]blue points[/b][/color] around quite a bit![/i] [/color]
Line [b][i]a[/i][/b] and Line [i][b]b[/b][/i] are parallel lines. Move the blue points around. What do you notice?
Define parallel lines in your own words.
[color=#000000]This applet demonstrates a property that perpendicular lines have when they're drawn in the coordinate plane. [br][br][i]Be sure to move the points around quite a bit and observe carefully as you do! [/i][/color]
Line [b][i]a[/i][/b] and Line [b][i]b[/i][/b] are examples of perpendicular lines. What do you notice happens to both lines when you move the dots around?
What is a perpendicular line in your own words?