横向
1
Collection of distinct elements
3
Comparison of two quantities
4
The number representing nothing
5
Repeated addition
6
Lines that never intersect
11
Steepness of a line
纵向
2
Power to which a number is raised
7
System of ordered marks for measuring
8
Longest side of a right triangle
9
Closed shape with straight sides
10
Part of a line with two endpoints