Across
1
Number that divides evenly into another
5
Symbol representing unknown value
6
Single numeral from 0 to 9
7
Middle value in an ordered dataset
9
Result of raising a number to an exponent
10
The number representing nothing
12
Lines that never intersect
Down
2
Line segment connecting two circle points
3
Proven mathematical statement
4
Math using letters for unknown values
8
Sum divided by count
11
Part of a whole number