横向
1
Three-sided polygon
5
Part of a whole number
6
Number that divides evenly into another
7
Distance from center to edge of circle
8
Lines that never intersect
纵向
2
Value that does not change
3
System of ordered marks for measuring
4
Symbol representing unknown value
9
Closed shape with straight sides
10
Visual representation of data
11
Number less than zero
12
Rectangular array of numbers
13
Parts per hundred