Quadratic Function Stage 4: Geometry & Limits

This GeoGebra example demonstrates the graph of a quadratic function interacting with geometric constructions. Core concepts include quadratic functions, curve plotting, orthocenter, special points, and limit values. Construction uses Intersect and Vector commands on objects such as a, h, k, d, e, A, B, C, u, v, c, ah plus text labels. Suitable for high school or introductory college learners exploring function graphs and geometric properties.