Across
- 1. a 3D object with squares for faces.
- 4. 公式
- 7. a 2D shape without curves
- 10. the top part of a fraction.
- 13. 代数
- 14. has five sides.
- 15. points have 0, lines have 1, squares have 2, people have 3.
- 16. the opposite of exterior angles.
- 17. a number with only 2 factors.
Down
- 2. his formula has vertices, edges, and faces in it.
- 3. has 4 sides.
- 5. 3D, and every face is a plane
- 6. 增加
- 8. equilateral and equiangular
- 9. multiply these to get a product
- 11. from smallest to biggest.
- 12. a number with more than 2 factors