横向
1
Result of multiplication
3
Lines that never intersect
5
Rectangle with four equal sides
7
Space between two intersecting lines
8
Middle value in an ordered dataset
10
Number greater than zero
12
Repeated addition
纵向
2
Round shape with all points equidistant
4
Distance from center to edge of circle
5
Result of addition
6
Single numeral from 0 to 9
9
Power to which a number is raised
11
Steepness of a line
13
Split into equal parts