横向
1
Divisible by two
3
Visual representation of data
4
Line crossing from corner to corner
7
Result of multiplication
8
Reference line in a graph
9
U-shaped curve of a quadratic function
11
Single numeral from 0 to 9
12
Space between two intersecting lines
纵向
2
Number greater than zero
4
Split into equal parts
5
Three-sided polygon
6
Symbol representing unknown value
10
Part of a line with two endpoints
13
Line touching circle at one point