- 多边形 duōbiānxíng polygonA closed plane figure with three or more sides, such as a triangle or a square
- 正多边形 zhèngduōbiānxíng regular polygonA polygon where all sides and all interior angles are equal
- 凸多边形 tūduōbiānxíng convex polygona polygon where every internal angle is less than 180 degrees
- 多边贸易 duōbiānmàoyì multilateral tradetrade activities or commercial transactions conducted between three or more countries or regions