Across
1
Collection of distinct elements
3
Number greater than zero
4
Difference between highest and lowest values
5
Middle value in an ordered dataset
8
Amount of space an object occupies
10
Part of a circle's circumference
12
Lines that never intersect
Down
2
Total distance around a shape
6
Steepness of a line
7
Number divisible only by 1 and itself
9
Rectangular array of numbers
11
Longest side of a right triangle