Invariance of a Product of Triangle Areas within a Quadrilateral

This example demonstrates the invariance of the product of triangle areas within a quadrilateral. Key mathematical concepts include triangle area calculation, trigonometry, and geometric construction. Using GeoGebra commands such as Polygon, Segment, and Intersect, a series of triangles are constructed to observe the invariance of their area product. Suitable for high school mathematics education, particularly in geometry and trigonometry courses.