横向
1
Part of a whole number
4
Corner point of a polygon
6
Symbol representing unknown value
7
Line crossing from corner to corner
11
Rectangular array of numbers
纵向
2
Number greater than zero
3
Part of a circle's circumference
5
Reference line in a graph
8
Sum divided by count
9
Result of multiplication
10
Number with digits after a point
12
Math using letters for unknown values
13
Lines that never intersect