Basic Terms in Geometry Interactive Demo

① This GeoGebra example provides an interactive visualization of fundamental geometry terms, including points, lines, segments, rays, angles, circles, ellipses, perpendiculars, and vectors, along with their relationships. ② Core mathematical concepts cover definitions of basic geometric elements, angle measurement and rotation, vector direction, perpendicular construction, and polygon (e.g., triangle) composition, while also touching on rational numbers, roots, variance, and centroid as extended topics, but the main focus is on visual comprehension of geometry terminology. ③ Construction highlights: from the summary, commands such as Line, Segment, Ray, Intersect, Vector, Rotate, Angle, Circle, Point, Ellipse, and OrthogonalLine are used, creating multiple points (A, B, C, D, E, F, G, H, I), lines (a, b, c, lin_r, lin_l), rays (vec_ray), vectors (vec_left, vec_right), angles (α, β, γ, δ), circles, ellipses, and perpendiculars (perpen_ray). A slider (angleSlider) and buttons (buttonInc, buttonDec) control angle changes, with text objects (text1 to text7) labeling terms for interactive learning. ④ Suitable for middle school to high school students beginning geometry, and also useful for teachers as a classroom demonstration tool to help learners build geometric intuition through dynamic manipulation and distinguish easily confused terms (e.g., segment vs. ray, angle vs. rotation).