横向
1
Mathematical statement of equality
5
Closed shape with straight sides
6
Lines that never intersect
9
Rectangular array of numbers
10
Middle value in an ordered dataset
11
Longest side of a right triangle
纵向
2
Round shape with all points equidistant
3
Line segment connecting two circle points
4
U-shaped curve of a quadratic function
7
Number greater than zero
8
Space between two intersecting lines
12
Repeated addition