How To draw and label perpendicular line segments?

To draw and label perpendicular line segments, start by drawing a horizontal line segment using a ruler. Next, use a protractor to measure a 90-degree angle from one endpoint of the segment, and draw a vertical line segment from that point. Label the endpoints of each line segment with letters (e.g., A, B for the horizontal segment and C, D for the vertical segment). Finally, clearly indicate that the segments AB and CD are perpendicular by marking the right angle at their intersection.