横向
1
Part of a circle's circumference
2
Number divisible only by 1 and itself
3
Lines that never intersect
6
Line segment connecting two circle points
7
Comparison of two quantities
8
Single numeral from 0 to 9
纵向
1
Math using letters for unknown values
4
Result of multiplication
5
Steepness of a line
9
Rectangle with four equal sides