Across
1
Rectangular array of numbers
3
Value that does not change
4
Number less than zero
10
Number with digits after a point
11
System of ordered marks for measuring
12
Distance from center to edge of circle
13
Symbol representing unknown value
14
Result of addition
Down
2
Mathematical statement of equality
5
Power to which a number is raised
6
Line touching circle at one point
7
The number representing nothing
8
Middle value in an ordered dataset
9
Difference between highest and lowest values