Across
1
Power to which a number is raised
4
System of ordered marks for measuring
7
Sum divided by count
9
Divisible by two
11
Single numeral from 0 to 9
12
Collection of distinct elements
Down
2
Amount of space an object occupies
3
Line touching circle at one point
5
Difference between highest and lowest values
6
Closed shape with straight sides
8
Math using letters for unknown values
10
Distance from center to edge of circle