横向
1
Distance from center to edge of circle
4
Result of multiplication
6
U-shaped curve of a quadratic function
7
Number less than zero
12
Line crossing from corner to corner
纵向
2
Repeated addition
3
Visual representation of data
5
Number that divides evenly into another
8
Mathematical statement of equality
9
Three-sided polygon
10
Part of a line with two endpoints
11
Space between two intersecting lines
13
Math using letters for unknown values