横向
1
Symbol representing unknown value
5
Three-sided polygon
7
Mathematical statement of equality
纵向
2
Middle value in an ordered dataset
3
Single numeral from 0 to 9
4
Divisible by two
6
Part of a circle's circumference
8
Visual representation of data
9
Line segment connecting two circle points
10
Math using letters for unknown values
11
Rectangle with four equal sides