Across
1
Proven mathematical statement
5
Rectangle with four equal sides
6
Line crossing from corner to corner
8
Mathematical statement of equality
10
Collection of distinct elements
11
Reference line in a graph
Down
2
Number with digits after a point
3
Value that does not change
4
Parts per hundred
5
Exact correspondence on both sides
7
Symbol representing unknown value
9
Longest side of a right triangle
12
Visual representation of data
13
Sum divided by count