横向
1
Split into equal parts
4
Proven mathematical statement
5
Sum divided by count
6
Result of raising a number to an exponent
8
Math using letters for unknown values
10
Reference line in a graph
12
Longest side of a right triangle
纵向
2
Collection of distinct elements
3
Symbol representing unknown value
7
Number greater than zero
9
Part of a circle's circumference
11
Number divisible only by 1 and itself
13
Space between two intersecting lines