横向
1
Single numeral from 0 to 9
3
Space between two intersecting lines
5
Number that divides evenly into another
6
Closed shape with straight sides
8
Collection of distinct elements
10
Line touching circle at one point
12
Part of a circle's circumference
纵向
2
Difference between highest and lowest values
4
Three-sided polygon
7
Total distance around a shape
9
Result of multiplication
11
Part of a line with two endpoints
13
Number less than zero