横向
1
Longest side of a right triangle
4
Part of a line with two endpoints
6
Reference line in a graph
7
Space between two intersecting lines
10
Visual representation of data
纵向
2
U-shaped curve of a quadratic function
3
System of ordered marks for measuring
4
Exact correspondence on both sides
5
Lines that never intersect
8
Middle value in an ordered dataset
9
The number representing nothing
11
Rectangle with four equal sides