横向
1
Proven mathematical statement
3
Result of multiplication
7
Number greater than zero
8
Collection of distinct elements
9
Distance from center to edge of circle
10
Symbol representing unknown value
纵向
2
The number representing nothing
3
U-shaped curve of a quadratic function
4
Corner point of a polygon
5
Rectangular array of numbers
6
Parts per hundred
11
Value that does not change
12
Closed shape with straight sides