横向
1
Space between two intersecting lines
5
Three-sided polygon
6
System of ordered marks for measuring
7
Steepness of a line
10
Rectangular array of numbers
11
Math using letters for unknown values
纵向
2
Difference between highest and lowest values
3
Sum divided by count
4
Line touching circle at one point
6
Part of a line with two endpoints
8
Number that divides evenly into another
9
The number representing nothing