横向
1
Line segment connecting two circle points
4
Longest side of a right triangle
5
Proven mathematical statement
6
Space between two intersecting lines
7
Math using letters for unknown values
纵向
2
Mathematical statement of equality
3
System of ordered marks for measuring
8
Symbol representing unknown value
9
Number with digits after a point
10
Lines that never intersect
11
Exact correspondence on both sides