Across
1
Number that divides evenly into another
4
Result of multiplication
6
Exact correspondence on both sides
7
Single numeral from 0 to 9
8
Power to which a number is raised
9
Steepness of a line
Down
2
Closed shape with straight sides
3
Three-sided polygon
4
Total distance around a shape
5
Mathematical statement of equality
10
Proven mathematical statement
11
Symbol representing unknown value
12
Result of addition