横向
1
Split into equal parts
2
Collection of distinct elements
6
Math using letters for unknown values
7
The number representing nothing
8
Lines that never intersect
11
Line segment connecting two circle points
纵向
2
Rectangle with four equal sides
3
Steepness of a line
4
Symbol representing unknown value
5
Rectangular array of numbers
9
Divisible by two
10
Part of a whole number