Across
1
Total distance around a shape
5
Value that does not change
6
Part of a circle's circumference
8
Three-sided polygon
9
The number representing nothing
10
Sum divided by count
14
Longest side of a right triangle
Down
2
Visual representation of data
3
Reference line in a graph
4
Comparison of two quantities
7
Space between two intersecting lines
11
Parts per hundred
12
Divisible by two
13
Collection of distinct elements