Across
1
Power to which a number is raised
6
Round shape with all points equidistant
8
Distance from center to edge of circle
10
Total distance around a shape
12
Closed shape with straight sides
13
Difference between highest and lowest values
Down
2
Exact correspondence on both sides
3
The number representing nothing
4
Single numeral from 0 to 9
5
System of ordered marks for measuring
7
Mathematical statement of equality
9
Number that divides evenly into another
11
Result of raising a number to an exponent