Across
1
Part of a line with two endpoints
5
Line crossing from corner to corner
7
Parts per hundred
8
Number less than zero
9
Math using letters for unknown values
10
Proven mathematical statement
11
Divisible by two
Down
2
Symbol representing unknown value
3
Mathematical rule or equation
4
Value that does not change
6
The number representing nothing
7
Result of raising a number to an exponent