Across
1
Math using letters for unknown values
5
Longest side of a right triangle
8
Middle value in an ordered dataset
9
Rectangular array of numbers
11
Split into equal parts
12
Difference between highest and lowest values
13
Visual representation of data
Down
2
Symbol representing unknown value
3
Line crossing from corner to corner
4
Corner point of a polygon
6
Repeated addition
7
Number divisible only by 1 and itself
10
Steepness of a line