横向
1
Single numeral from 0 to 9
4
Rectangle with four equal sides
5
Visual representation of data
7
Mathematical statement of equality
9
Closed shape with straight sides
纵向
2
Longest side of a right triangle
3
Number divisible only by 1 and itself
4
Exact correspondence on both sides
6
Line segment connecting two circle points
8
Math using letters for unknown values