Across
1
Number divisible only by 1 and itself
5
Rectangle with four equal sides
6
Lines that never intersect
7
Single numeral from 0 to 9
8
Middle value in an ordered dataset
10
Number greater than zero
11
Comparison of two quantities
Down
2
Steepness of a line
3
Reference line in a graph
4
Power to which a number is raised
9
Line crossing from corner to corner
12
Corner point of a polygon