Across
1
Rectangular array of numbers
4
Rectangle with four equal sides
5
Line segment connecting two circle points
6
Lines that never intersect
9
Space between two intersecting lines
10
The number representing nothing
Down
2
Power to which a number is raised
3
Reference line in a graph
7
Distance from center to edge of circle
8
Line crossing from corner to corner
11
Difference between highest and lowest values
12
Result of addition