Drag 3 Points to Define a Line

This example demonstrates geometrically how to define a line by dragging three points. It involves core math concepts like coordinate geometry, linear equations, and triangle construction. Key GeoGebra commands used include Line, with objects such as a, A, D, E, f, solvedA, B, C, solvedB, solvedC, checkAB, checkBC, checkAC, correct, and text1. Suitable for high school mathematics education to understand linear equations and triangle properties.