Similar Triangles and Intercepts on the Coordinate Plane

① This example demonstrates the relationship between similar triangles and intercepts on the coordinate plane, visually showing that corresponding sides of similar triangles are proportional. ② Core math concepts include similar triangles, ratios, coordinate geometry intercepts, linear equations, and right triangles. ③ Construction: Using GeoGebra commands such as Polygon to create triangles, Angle to mark angles, and defining points A, B, C, D, E, F etc., with segments (d, e, t1, t2) and text labels (text1-text4) to display side lengths and angle measures, possibly involving parallel lines or intercept constructions. ④ Suitable for middle school advanced or high school students, for integrating geometry and algebra, helping understand similar triangles in coordinate systems and solving problems via intercepts and proportions.