横向
1
Split into equal parts
4
Round shape with all points equidistant
5
Longest side of a right triangle
6
Line touching circle at one point
8
Symbol representing unknown value
纵向
1
Single numeral from 0 to 9
2
Corner point of a polygon
3
Lines that never intersect
7
The number representing nothing
9
Result of addition
10
Collection of distinct elements
11
Number greater than zero
12
Rectangle with four equal sides