横向
1
Collection of distinct elements
3
Three-sided polygon
5
Single numeral from 0 to 9
7
Longest side of a right triangle
8
Result of raising a number to an exponent
10
Visual representation of data
纵向
2
Parts per hundred
4
Mathematical rule or equation
6
U-shaped curve of a quadratic function
9
Exact correspondence on both sides
11
Repeated addition
12
The number representing nothing