横向
1
Proven mathematical statement
5
Middle value in an ordered dataset
6
The number representing nothing
7
Line touching circle at one point
9
Number less than zero
11
Reference line in a graph
纵向
2
Symbol representing unknown value
3
Result of multiplication
4
Mathematical statement of equality
8
Steepness of a line
10
Mathematical rule or equation
12
Number that divides evenly into another
13
Space between two intersecting lines
14
Amount of space an object occupies