Across
1
Exact correspondence on both sides
2
Line touching circle at one point
4
Mathematical rule or equation
5
Repeated addition
6
Mathematical statement of equality
7
Total distance around a shape
Down
2
Proven mathematical statement
3
Rectangular array of numbers
4
Number that divides evenly into another
7
Closed shape with straight sides
8
Number with digits after a point
9
Difference between highest and lowest values