横向
1
Reference line in a graph
3
Math using letters for unknown values
5
Part of a whole number
6
Amount of space an object occupies
8
Sum divided by count
纵向
2
Line crossing from corner to corner
4
Result of addition
6
Corner point of a polygon
7
Parts per hundred
9
Exact correspondence on both sides
10
Middle value in an ordered dataset
11
Distance from center to edge of circle
12
Line touching circle at one point