横向
1
Symbol representing unknown value
5
Corner point of a polygon
6
Total distance around a shape
7
Comparison of two quantities
8
Value that does not change
9
Amount of space an object occupies
12
Mathematical rule or equation
14
Line segment connecting two circle points
纵向
2
Sum divided by count
3
Number that divides evenly into another
4
Number greater than zero
10
Rectangular array of numbers
11
Number with digits after a point
13
Math using letters for unknown values
15
Number divisible only by 1 and itself