Across
1
Closed shape with straight sides
4
Number that divides evenly into another
5
Result of raising a number to an exponent
6
The number representing nothing
9
Middle value in an ordered dataset
11
Difference between highest and lowest values
12
Power to which a number is raised
Down
2
Proven mathematical statement
3
Sum divided by count
7
Lines that never intersect
8
Steepness of a line
10
Symbol representing unknown value