Across
1
Symbol representing unknown value
5
Number greater than zero
6
Split into equal parts
7
Part of a line with two endpoints
8
Mathematical rule or equation
9
Line crossing from corner to corner
10
Round shape with all points equidistant
Down
2
Number less than zero
3
Reference line in a graph
4
Sum divided by count
5
Closed shape with straight sides
11
Exact correspondence on both sides