Across
1
Proven mathematical statement
4
Sum divided by count
8
Part of a whole number
9
Number divisible only by 1 and itself
10
Visual representation of data
11
Repeated addition
12
Three-sided polygon
13
The number representing nothing
Down
2
Rectangle with four equal sides
3
Math using letters for unknown values
5
Total distance around a shape
6
Lines that never intersect
7
Rectangular array of numbers