横向
1
Steepness of a line
4
Number with digits after a point
5
Mathematical rule or equation
8
Middle value in an ordered dataset
9
Difference between highest and lowest values
11
Part of a whole number
12
The number representing nothing
纵向
2
Space between two intersecting lines
3
Repeated addition
6
Line segment connecting two circle points
7
Symbol representing unknown value
10
Reference line in a graph