横向
1
Repeated addition
5
Value that does not change
6
U-shaped curve of a quadratic function
7
Number greater than zero
8
Part of a whole number
9
Round shape with all points equidistant
11
The number representing nothing
纵向
2
Distance from center to edge of circle
3
Line crossing from corner to corner
4
Symbol representing unknown value
5
Line segment connecting two circle points
10
Divisible by two
12
Middle value in an ordered dataset
13
Result of addition
14
Steepness of a line