Across
1
Line crossing from corner to corner
4
Proven mathematical statement
7
Symbol representing unknown value
10
Power to which a number is raised
11
Divisible by two
Down
2
Part of a line with two endpoints
3
Number less than zero
5
Closed shape with straight sides
6
System of ordered marks for measuring
8
Middle value in an ordered dataset
9
Number that divides evenly into another