横向
1
Total distance around a shape
4
Collection of distinct elements
5
Power to which a number is raised
9
Number divisible only by 1 and itself
纵向
1
Number greater than zero
2
Line segment connecting two circle points
3
Number that divides evenly into another
6
Part of a line with two endpoints
7
Math using letters for unknown values
8
Space between two intersecting lines