Across
1
Symbol representing unknown value
4
Exact correspondence on both sides
6
Result of raising a number to an exponent
7
Space between two intersecting lines
8
Part of a line with two endpoints
9
Power to which a number is raised
10
Parts per hundred
Down
2
Number less than zero
3
Proven mathematical statement
4
Collection of distinct elements
5
Math using letters for unknown values
11
Steepness of a line