Across
1
Distance from center to edge of circle
3
Closed shape with straight sides
4
Difference between highest and lowest values
5
Number less than zero
7
Lines that never intersect
12
Rectangular array of numbers
13
Value that does not change
14
Three-sided polygon
Down
2
The number representing nothing
3
Number greater than zero
6
Number that divides evenly into another
8
Part of a whole number
9
Sum divided by count
10
Repeated addition
11
Split into equal parts