Construct Perpendicular Line through a Point Not on the Line

This example demonstrates how to construct a perpendicular line through a point not on a given line using GeoGebra. The core mathematical concepts involved include lines, perpendicular lines, and geometric constructions. Key construction steps involve using GeoGebra commands like Segment to define points A and B, and constructing the perpendicular line C through points f and E. This example is suitable for middle school and above students learning basic geometric constructions in analytical geometry.