Across
1
Distance from center to edge of circle
3
The number representing nothing
4
Part of a whole number
6
Difference between highest and lowest values
9
U-shaped curve of a quadratic function
10
Power to which a number is raised
11
Math using letters for unknown values
12
System of ordered marks for measuring
Down
1
Comparison of two quantities
2
Number less than zero
5
Part of a line with two endpoints
7
Middle value in an ordered dataset
8
Mathematical statement of equality