Across
1
Split into equal parts
3
Space between two intersecting lines
7
Power to which a number is raised
8
Result of raising a number to an exponent
9
The number representing nothing
12
Corner point of a polygon
Down
2
Difference between highest and lowest values
4
Steepness of a line
5
Part of a whole number
6
Middle value in an ordered dataset
10
Number greater than zero
11
Mathematical rule or equation
13
Sum divided by count