横向
1
Math using letters for unknown values
5
Visual representation of data
7
Distance from center to edge of circle
8
Exact correspondence on both sides
9
Amount of space an object occupies
10
Three-sided polygon
纵向
2
Repeated addition
3
U-shaped curve of a quadratic function
4
Number that divides evenly into another
6
Part of a line with two endpoints
11
Middle value in an ordered dataset
12
Symbol representing unknown value