Across
1
Number that divides evenly into another
4
Split into equal parts
6
The number representing nothing
7
Middle value in an ordered dataset
8
Collection of distinct elements
9
Value that does not change
11
Distance from center to edge of circle
Down
2
Closed shape with straight sides
3
Lines that never intersect
5
Sum divided by count
10
Math using letters for unknown values
12
Power to which a number is raised