Across
1
Result of raising a number to an exponent
4
Symbol representing unknown value
5
Math using letters for unknown values
9
Space between two intersecting lines
10
Proven mathematical statement
11
Power to which a number is raised
Down
2
Collection of distinct elements
3
Line crossing from corner to corner
6
Line touching circle at one point
7
Single numeral from 0 to 9
8
Mathematical statement of equality
12
Reference line in a graph