横向
1
Mathematical rule or equation
3
Difference between highest and lowest values
5
Number greater than zero
6
Longest side of a right triangle
8
Split into equal parts
11
Rectangular array of numbers
12
Rectangle with four equal sides
纵向
2
Exact correspondence on both sides
3
Distance from center to edge of circle
4
Reference line in a graph
7
Symbol representing unknown value
9
Proven mathematical statement
10
Line touching circle at one point
13
Steepness of a line