Across
1
Steepness of a line
4
Math using letters for unknown values
5
Round shape with all points equidistant
6
Parts per hundred
7
Sum divided by count
8
Space between two intersecting lines
9
Corner point of a polygon
10
Power to which a number is raised
Down
2
Part of a whole number
3
Number less than zero
11
Comparison of two quantities
12
The number representing nothing