横向
1
Three-sided polygon
5
Total distance around a shape
7
Steepness of a line
8
Space between two intersecting lines
10
Corner point of a polygon
12
Proven mathematical statement
14
Repeated addition
纵向
2
U-shaped curve of a quadratic function
3
Number divisible only by 1 and itself
4
Middle value in an ordered dataset
6
Parts per hundred
9
Number that divides evenly into another
11
Visual representation of data
13
The number representing nothing
15
Result of raising a number to an exponent