横向
1
Proven mathematical statement
6
Number with digits after a point
7
The number representing nothing
9
Mathematical statement of equality
13
Line touching circle at one point
纵向
2
Exact correspondence on both sides
3
Steepness of a line
4
Distance from center to edge of circle
5
Longest side of a right triangle
8
Repeated addition
10
Power to which a number is raised
11
Rectangular array of numbers
12
Symbol representing unknown value