横向
1
Repeated addition
4
Corner point of a polygon
5
Proven mathematical statement
7
Rectangle with four equal sides
8
Exact correspondence on both sides
9
Difference between highest and lowest values
10
Symbol representing unknown value
11
The number representing nothing
纵向
2
Split into equal parts
3
Longest side of a right triangle
6
Middle value in an ordered dataset
8
Result of addition