横向
1
Difference between highest and lowest values
4
Line segment connecting two circle points
6
Number less than zero
7
Steepness of a line
8
Mathematical rule or equation
12
U-shaped curve of a quadratic function
纵向
2
Three-sided polygon
3
Line crossing from corner to corner
5
Round shape with all points equidistant
9
Proven mathematical statement
10
Corner point of a polygon
11
Comparison of two quantities