Across
1
Rectangle with four equal sides
5
The number representing nothing
6
Number less than zero
7
Lines that never intersect
8
System of ordered marks for measuring
Down
2
Power to which a number is raised
3
Rectangular array of numbers
4
Reference line in a graph
9
Line crossing from corner to corner
10
Number greater than zero
11
Part of a circle's circumference
12
Visual representation of data
13
Number with digits after a point