横向
1
Number divisible only by 1 and itself
4
Number less than zero
7
Three-sided polygon
8
Lines that never intersect
纵向
1
Closed shape with straight sides
2
Line crossing from corner to corner
3
Divisible by two
5
Split into equal parts
6
Longest side of a right triangle
9
Difference between highest and lowest values
10
Part of a whole number
11
The number representing nothing
12
Part of a circle's circumference