横向
1
Distance from center to edge of circle
5
Number divisible only by 1 and itself
7
Rectangle with four equal sides
8
Symbol representing unknown value
9
Longest side of a right triangle
纵向
2
Steepness of a line
3
The number representing nothing
4
Number greater than zero
6
Reference line in a graph
10
Number less than zero
11
Value that does not change