Across
1
Mathematical rule or equation
4
Split into equal parts
5
Difference between highest and lowest values
6
Three-sided polygon
7
Exact correspondence on both sides
8
Visual representation of data
11
Single numeral from 0 to 9
12
Steepness of a line
Down
2
Total distance around a shape
3
Repeated addition
5
Distance from center to edge of circle
9
Amount of space an object occupies
10
Rectangle with four equal sides
13
Power to which a number is raised