横向
1
Corner point of a polygon
4
Mathematical statement of equality
5
Number divisible only by 1 and itself
7
Value that does not change
10
Total distance around a shape
11
Lines that never intersect
13
Exact correspondence on both sides
纵向
2
Proven mathematical statement
3
Split into equal parts
6
Closed shape with straight sides
8
Power to which a number is raised
9
Math using letters for unknown values
12
The number representing nothing