横向
1
Round shape with all points equidistant
4
Line segment connecting two circle points
8
Line touching circle at one point
9
Number less than zero
12
Distance from center to edge of circle
纵向
2
Number with digits after a point
3
Lines that never intersect
5
Line crossing from corner to corner
6
Mathematical statement of equality
7
Part of a whole number
10
Amount of space an object occupies
11
System of ordered marks for measuring