Copy of Parallel and Perpendicular Lines

Description
Draws a green dash dot line parallel or perpendicular to a blue line. The blue line is controlled by the points A and B which can be freely moved. The green line is positioned with the point C. Clicking the button will switch the green line between parallel and perpendicular . The corresponding equations in slope intercept form are shown. A check box allows you to also show the slope of each line.
y=mx+c
When the lines are parallel, what do you notice about their slopes?
Click the button to shown perpendicular lines.
What do you notice about the slopes of perpendicular lines?
Close

Information: Copy of Parallel and Perpendicular Lines