横向
1
Part of a line with two endpoints
5
Total distance around a shape
7
Number greater than zero
8
Exact correspondence on both sides
13
Comparison of two quantities
纵向
2
Corner point of a polygon
3
Repeated addition
4
Proven mathematical statement
6
System of ordered marks for measuring
9
Reference line in a graph
10
Value that does not change
11
Middle value in an ordered dataset
12
Symbol representing unknown value