横向
1
Line touching circle at one point
3
Line segment connecting two circle points
4
System of ordered marks for measuring
7
Symbol representing unknown value
8
Steepness of a line
10
Divisible by two
纵向
2
Split into equal parts
4
Exact correspondence on both sides
5
Corner point of a polygon
6
Proven mathematical statement
9
U-shaped curve of a quadratic function
11
Math using letters for unknown values