Points, Lines, Planes

① This example demonstrates the basic construction and mutual relationships of points, segments, vectors, polygons, and planes in three‑dimensional space. ② Core mathematical concepts include definitions of points, lines, and planes; vector representation; polygon vertex sequences; and plane equations. ③ Construction highlights: GeoGebra commands Point create points A, B, C, D, E, F, G; Segment and Vector generate segments and vectors u, v; Polygon builds polygon poly1; Plane defines planes d, e, f, g; text objects label title, points, lines, and planes. ④ Suitable for high‑school solid geometry, introductory college analytic geometry, and geometric construction practice, serving as classroom demonstration or self‑study material.