Across
1
Part of a circle's circumference
3
Math using letters for unknown values
5
Round shape with all points equidistant
6
Middle value in an ordered dataset
7
Number that divides evenly into another
11
Result of raising a number to an exponent
12
Line touching circle at one point
Down
2
Exact correspondence on both sides
4
Mathematical statement of equality
8
Sum divided by count
9
Distance from center to edge of circle
10
Closed shape with straight sides