横向
1
Total distance around a shape
3
Closed shape with straight sides
4
Collection of distinct elements
5
Value that does not change
7
Sum divided by count
10
Mathematical rule or equation
纵向
2
Repeated addition
3
U-shaped curve of a quadratic function
6
Single numeral from 0 to 9
8
Reference line in a graph
9
Space between two intersecting lines