Across
1
Math using letters for unknown values
5
Difference between highest and lowest values
6
Sum divided by count
7
Closed shape with straight sides
11
Mathematical rule or equation
12
Three-sided polygon
13
Repeated addition
Down
2
Middle value in an ordered dataset
3
Corner point of a polygon
4
Reference line in a graph
7
Total distance around a shape
8
Value that does not change
9
Parts per hundred
10
Comparison of two quantities