Across
1
Math using letters for unknown values
3
Result of addition
4
Part of a line with two endpoints
8
The number representing nothing
9
Difference between highest and lowest values
11
Divisible by two
Down
2
Total distance around a shape
5
Visual representation of data
6
Longest side of a right triangle
7
Part of a circle's circumference
10
Parts per hundred
12
Middle value in an ordered dataset