横向
1
Distance from center to edge of circle
5
Mathematical statement of equality
6
Line crossing from corner to corner
8
Middle value in an ordered dataset
纵向
2
Round shape with all points equidistant
3
Value that does not change
4
Number less than zero
7
U-shaped curve of a quadratic function
9
Result of addition
10
Part of a line with two endpoints
11
Number greater than zero