横向
1
Space between two intersecting lines
4
Result of multiplication
5
Reference line in a graph
8
Corner point of a polygon
10
Divisible by two
11
Parts per hundred
13
Round shape with all points equidistant
纵向
2
Exact correspondence on both sides
3
System of ordered marks for measuring
6
Mathematical rule or equation
7
Line touching circle at one point
9
U-shaped curve of a quadratic function
12
Number with digits after a point