横向
1
Steepness of a line
4
Corner point of a polygon
5
Mathematical statement of equality
7
Total distance around a shape
10
Collection of distinct elements
纵向
2
The number representing nothing
3
Lines that never intersect
5
Divisible by two
6
Single numeral from 0 to 9
8
Math using letters for unknown values
9
Amount of space an object occupies