横向
1
Number less than zero
6
Lines that never intersect
7
Part of a line with two endpoints
10
Mathematical statement of equality
11
System of ordered marks for measuring
纵向
2
Corner point of a polygon
3
The number representing nothing
4
Number divisible only by 1 and itself
5
Symbol representing unknown value
8
Value that does not change
9
Number that divides evenly into another