Across
1
Power to which a number is raised
2
Exact correspondence on both sides
5
Space between two intersecting lines
7
Symbol representing unknown value
8
Result of raising a number to an exponent
11
Lines that never intersect
Down
2
Rectangle with four equal sides
3
Rectangular array of numbers
4
Sum divided by count
6
Repeated addition
8
Number greater than zero
9
Single numeral from 0 to 9
10
Math using letters for unknown values
12
Number less than zero