Across
1
Rectangle with four equal sides
3
Number that divides evenly into another
6
Exact correspondence on both sides
7
Power to which a number is raised
8
Lines that never intersect
9
Collection of distinct elements
11
Rectangular array of numbers
13
Middle value in an ordered dataset
Down
2
Line crossing from corner to corner
4
Longest side of a right triangle
5
Value that does not change
10
Amount of space an object occupies
12
Number less than zero