Across
1
Line crossing from corner to corner
3
Total distance around a shape
4
Split into equal parts
8
Difference between highest and lowest values
11
Middle value in an ordered dataset
Down
2
Three-sided polygon
4
Single numeral from 0 to 9
5
Amount of space an object occupies
6
Part of a circle's circumference
7
Round shape with all points equidistant
9
Result of addition
10
Number with digits after a point