横向
1
Part of a circle's circumference
3
Closed shape with straight sides
6
Number that divides evenly into another
7
Math using letters for unknown values
9
Distance from center to edge of circle
10
Steepness of a line
11
Space between two intersecting lines
12
Symbol representing unknown value
纵向
2
Rectangular array of numbers
3
Parts per hundred
4
Longest side of a right triangle
5
Mathematical statement of equality
6
Mathematical rule or equation
8
The number representing nothing
13
Value that does not change