柯林斯詞典polygon /?p?l??ɡ?n/ 1. N a closed plane figure bounded by three or more straight sides that meet in pairs in the same number of vertices, and do not intersect other than at these vertices. The sum of the interior angles is (n–2)?×?180° for n sides; the sum of the exterior angles is 360°. A regular polygon has all its sides and angles equal. Specific polygons are named according to the number of sides, such as triangle, pentagon, etc 多邊形 返回 polygon劍橋詞典a flat shape with three or more straight sides 多邊形 Triangles and squares are polygons. 三角形和正方形是多邊形。 返回 polygon