横向
1
Reference line in a graph
3
Power to which a number is raised
4
The number representing nothing
8
Number with digits after a point
11
Lines that never intersect
纵向
2
Number greater than zero
5
Result of multiplication
6
Exact correspondence on both sides
7
Line segment connecting two circle points
9
U-shaped curve of a quadratic function
10
Math using letters for unknown values