横向
1
Lines that never intersect
5
The number representing nothing
6
Part of a line with two endpoints
7
Part of a whole number
8
Rectangular array of numbers
9
System of ordered marks for measuring
10
Collection of distinct elements
纵向
1
Total distance around a shape
2
Proven mathematical statement
3
Three-sided polygon
4
Math using letters for unknown values
11
Line segment connecting two circle points