Construct a perpendicular line through point A. Prove that the lines are perpendicular.

Perpendicular Lines from a Point Steps[br]1. Create Point A using the [icon]/images/ggb/toolbar/mode_point.png[/icon] tool[br]2. Create a line through point A using the [icon]/images/ggb/toolbar/mode_join.png[/icon]tool[br]3. Create Point C on line A using the [icon]/images/ggb/toolbar/mode_point.png[/icon] tool[br]4. Create a Compass with the a radius of AC using the [icon]/images/ggb/toolbar/mode_compasses.png[/icon]tool. [br]5. Label the new point D.[br]6. Create 2 equal compasses with a radius of CD with the [icon]/images/ggb/toolbar/mode_compasses.png[/icon] tool. 1 compass has a center at C and the other at D.[br]7. Name the points of intersection above and below the line E and F.[br]8. Create a point at the intersection of CD and EF.[br]9. Use the [icon]/images/ggb/toolbar/mode_angle.png[/icon]tool to show the measure of right angle to prove the lines perpendicular.[br][br][br]