Exterior Angles of a Regular Polygon

This example dynamically demonstrates the exterior‑angle property of regular polygons, showing each exterior angle and the constant sum of 360° for any number of sides. Core concepts include regular polygons, exterior angles, interior‑exterior angle relationships, and the polygon exterior‑angle sum theorem. Construction highlights: Circle creates the circumcircle, Point places vertices, Polygon builds the regular n‑gon, Ray draws exterior‑angle rays, Angle measures them, and a slider n controls the side count; objects such as n, A, c, B, poly1, a, b, d, e, f, g, h, i, j are used. Suitable for middle‑school geometry lessons, high‑school review, and independent exploration.