横向
1
Sum divided by count
5
Symbol representing unknown value
6
Comparison of two quantities
9
Distance from center to edge of circle
纵向
1
Space between two intersecting lines
2
Collection of distinct elements
3
Exact correspondence on both sides
4
Rectangular array of numbers
7
Line crossing from corner to corner
8
Corner point of a polygon
10
Longest side of a right triangle
11
Difference between highest and lowest values