横向
1
Result of addition
2
Corner point of a polygon
3
Comparison of two quantities
4
Mathematical statement of equality
9
Longest side of a right triangle
10
Number with digits after a point
11
Line segment connecting two circle points
12
The number representing nothing
13
Value that does not change
纵向
2
Amount of space an object occupies
5
Steepness of a line
6
Collection of distinct elements
7
Space between two intersecting lines
8
Sum divided by count