横向
1
Three-sided polygon
5
Distance from center to edge of circle
6
Middle value in an ordered dataset
8
Corner point of a polygon
9
Math using letters for unknown values
11
Closed shape with straight sides
纵向
2
U-shaped curve of a quadratic function
3
Sum divided by count
4
Space between two intersecting lines
7
Number that divides evenly into another
10
Repeated addition
12
Round shape with all points equidistant