横向
1
Parts per hundred
2
Rectangular array of numbers
5
Amount of space an object occupies
6
Lines that never intersect
7
Line touching circle at one point
9
Sum divided by count
11
Visual representation of data
纵向
1
U-shaped curve of a quadratic function
2
Repeated addition
3
Collection of distinct elements
4
The number representing nothing
8
Divisible by two
10
Part of a line with two endpoints
12
Line segment connecting two circle points
13
Distance from center to edge of circle