横向
1
Number with digits after a point
4
Divisible by two
5
Corner point of a polygon
8
Difference between highest and lowest values
9
Number divisible only by 1 and itself
纵向
2
Line segment connecting two circle points
3
Round shape with all points equidistant
5
Amount of space an object occupies
6
Middle value in an ordered dataset
7
Math using letters for unknown values