1. Create a circle with center at C that intersects segment AB at two different points (not A or B).[br]2. Create points D and E at those points of intersection.[br]3. Create a circle with a center at D that goes through E.[br]4. Create a circle with a center at E that goes through D.[br]5. Create Point F at the intersection below segment AB.[br]6. Create line CF.[br][br]Line CF is perpendicular to segment AB.