横向
1
Longest side of a right triangle
5
Space between two intersecting lines
6
Number less than zero
9
Middle value in an ordered dataset
10
Line segment connecting two circle points
纵向
2
Number that divides evenly into another
3
Part of a whole number
4
Math using letters for unknown values
7
Collection of distinct elements
8
Proven mathematical statement
11
Lines that never intersect