横向
1
Closed shape with straight sides
4
The number representing nothing
6
Line segment connecting two circle points
7
Reference line in a graph
8
Middle value in an ordered dataset
10
Part of a whole number
11
U-shaped curve of a quadratic function
纵向
2
Single numeral from 0 to 9
3
Longest side of a right triangle
5
System of ordered marks for measuring
6
Value that does not change
9
Proven mathematical statement
12
Result of raising a number to an exponent
13
Three-sided polygon