横向
1
Steepness of a line
5
U-shaped curve of a quadratic function
9
Three-sided polygon
纵向
2
Reference line in a graph
3
Collection of distinct elements
4
Line segment connecting two circle points
6
Line crossing from corner to corner
7
Longest side of a right triangle
8
Part of a whole number
10
Math using letters for unknown values
11
Number with digits after a point