横向
1
Round shape with all points equidistant
4
Symbol representing unknown value
5
Longest side of a right triangle
6
Part of a line with two endpoints
7
Amount of space an object occupies
纵向
2
Closed shape with straight sides
3
Line crossing from corner to corner
8
The number representing nothing
9
Distance from center to edge of circle
10
Visual representation of data
11
Number greater than zero
12
Parts per hundred