横向
1
Number divisible only by 1 and itself
3
Result of addition
4
Line segment connecting two circle points
5
Reference line in a graph
7
Comparison of two quantities
9
Total distance around a shape
纵向
2
Rectangle with four equal sides
3
Exact correspondence on both sides
6
Value that does not change
8
U-shaped curve of a quadratic function
10
Sum divided by count
11
Three-sided polygon
12
Symbol representing unknown value