Across
1
Symbol representing unknown value
4
Part of a whole number
6
Corner point of a polygon
9
Collection of distinct elements
10
Difference between highest and lowest values
12
Rectangular array of numbers
Down
2
Visual representation of data
3
Value that does not change
5
Sum divided by count
7
Comparison of two quantities
8
Result of multiplication
9
Rectangle with four equal sides
11
The number representing nothing
13
Part of a circle's circumference