横向
1
Split into equal parts
2
Exact correspondence on both sides
4
U-shaped curve of a quadratic function
7
Collection of distinct elements
10
Reference line in a graph
11
Distance from center to edge of circle
12
Space between two intersecting lines
纵向
2
Part of a line with two endpoints
3
Comparison of two quantities
5
Single numeral from 0 to 9
6
Closed shape with straight sides
8
Mathematical statement of equality
9
Mathematical rule or equation