横向
1
Line segment connecting two circle points
2
Corner point of a polygon
3
Comparison of two quantities
4
U-shaped curve of a quadratic function
9
Longest side of a right triangle
11
Rectangular array of numbers
纵向
2
Symbol representing unknown value
5
Part of a whole number
6
Divisible by two
7
Result of multiplication
8
Lines that never intersect
10
Number divisible only by 1 and itself