The directions for this activity can be found below the applet.
Use the [b]Slope[/b] tool to measure the slopes of the two lines [i]g[/i] and [i]i[/i]. Then, tamper with the [color=#444444][b]gray slider[/b][/color]. What do you notice about the slopes of these lines?
What does your observation from (1) tell you about lines (g) and (i)?
If a transversal (in this case, [i]n[/i]) intersects 2 lines that have the property that you wrote in response to (2) above, what can you conclude about a pair of [b][color=#1155cc]blue alternate interior angles [/color][/b]that were formed?