| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | polygon | mathematics education in Western countries | A polygon is a closed figure with straight lines and at least three sides. | 1 |
| 2 | polygon | mathematics education in the Western world | A polygon is a closed plane figure with straight sides. | 1 |
| 3 | regular polygon | mathematics education in Western countries | Regular polygons are commonly taught and studied in mathematics education, especially in geometry classes. | 1 |