Basic Orthocenter Construction of a Triangle

This example demonstrates how to construct the orthocenter of a triangle using GeoGebra geometric construction tools. The orthocenter is the intersection point of the three altitudes of a triangle, and the construction provides a visual understanding of its properties. Key math concepts involved include triangle, altitude, perpendicular line, right triangle, etc. The construction uses GeoGebra's Segment command to draw the triangle's sides and altitudes, and marks key points A, B, C and side lengths a, b, c. Suitable for middle school and above students to understand geometric properties and construction techniques.