Interactive Demo of Right Triangles, Cylinders, and Centroid Reflection

①This GeoGebra app introduction demonstrates a dynamic combination of right triangles, cylinders, centroid (barycenter), and reflection transformations. ②Core mathematical concepts include properties of right triangles, three-dimensional geometry of cylinders, definition and computation of centroid or barycenter, and planar reflection (axial symmetry) transformations affecting position and orientation. ③Construction highlights: although no specific commands are listed, based on the theme tags, the app likely uses polygon tools for the right triangle, cylinder or surface commands for the cylinder, centroid tools or calculations for the barycenter, and reflection tools for mirroring across a line; sliders or input boxes may adjust parameters dynamically. ④Suitable for middle/high school geometry, college analytic geometry, or computer-assisted instruction, helping students intuitively grasp the connection between geometric transformations and solid figures, and serving as a template for teachers creating interactive lessons.