横向
1
Lines that never intersect
4
Collection of distinct elements
5
Total distance around a shape
6
Rectangular array of numbers
10
Part of a whole number
纵向
2
Space between two intersecting lines
3
Symbol representing unknown value
4
Rectangle with four equal sides
7
Divisible by two
8
Comparison of two quantities
9
Three-sided polygon
11
The number representing nothing