| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | polygon | mathematical culture | A polygon is a closed two-dimensional shape with straight sides. | 1 |
| 2 | polygon | mathematical culture | A closed plane figure with straight sides | 1 |
| 3 | polyhedral surface | mathematical community | A polyhedral surface is a common concept in the mathematical community, used to describe a surface composed of multiple polygonal faces. | 1 |
| 4 | polyhedral surface | mathematical culture | Polyhedral surfaces are studied extensively in mathematics, especially in geometry and topology, and play a key role in understanding complex shapes and structures. | 1 |