Across
1
Power to which a number is raised
5
Line segment connecting two circle points
6
Math using letters for unknown values
7
Divisible by two
11
Corner point of a polygon
12
Part of a circle's circumference
Down
2
Number less than zero
3
Parts per hundred
4
Difference between highest and lowest values
5
Value that does not change
8
Repeated addition
9
Longest side of a right triangle
10
Mathematical rule or equation
13
The number representing nothing