Triangle's Orthocenter

This example demonstrates how to construct the orthocenter of a triangle using GeoGebra, including its intersection points and related geometric properties. Key math concepts involve perpendicular lines, intersection, triangle geometry, and symmetry. The construction utilizes commands like Polygon, OrthogonalLine, and Intersect, with objects such as points A, B, C, polygon poly1, and foot points c, a, b, f, g, h, D. Suitable for high school mathematics education to explore orthocenter properties and geometric construction techniques.