Across
1
Closed shape with straight sides
6
Symbol representing unknown value
7
Number divisible only by 1 and itself
8
Single numeral from 0 to 9
Down
2
Longest side of a right triangle
3
Sum divided by count
4
Math using letters for unknown values
5
Middle value in an ordered dataset
9
Result of raising a number to an exponent
10
Value that does not change
11
Number greater than zero
12
Result of multiplication