Across
1
Comparison of two quantities
4
Reference line in a graph
5
Round shape with all points equidistant
6
Line touching circle at one point
8
Middle value in an ordered dataset
10
Power to which a number is raised
12
Sum divided by count
Down
2
Number less than zero
3
Proven mathematical statement
7
Symbol representing unknown value
9
Part of a line with two endpoints
11
Number that divides evenly into another
13
Number with digits after a point