横向
1
Value that does not change
6
Symbol representing unknown value
8
Longest side of a right triangle
纵向
2
Number with digits after a point
3
System of ordered marks for measuring
4
Part of a line with two endpoints
5
Line crossing from corner to corner
7
Result of multiplication
9
Number that divides evenly into another
10
Line touching circle at one point
11
The number representing nothing
12
Exact correspondence on both sides