横向
1
Longest side of a right triangle
7
Visual representation of data
8
Space between two intersecting lines
9
Sum divided by count
10
Split into equal parts
12
Divisible by two
15
Line segment connecting two circle points
纵向
2
Math using letters for unknown values
3
Total distance around a shape
4
Proven mathematical statement
5
Difference between highest and lowest values
6
Distance from center to edge of circle
11
Repeated addition
13
System of ordered marks for measuring
14
Symbol representing unknown value