Across
1
Rectangular array of numbers
3
Number divisible only by 1 and itself
4
Collection of distinct elements
5
Symbol representing unknown value
7
Three-sided polygon
Down
2
Rectangle with four equal sides
3
Number greater than zero
6
Corner point of a polygon
8
Repeated addition
9
Line crossing from corner to corner
10
Part of a whole number
11
Visual representation of data