Across
1
Reference line in a graph
3
Proven mathematical statement
6
Line touching circle at one point
8
Number with digits after a point
10
Math using letters for unknown values
11
Part of a circle's circumference
Down
2
Comparison of two quantities
4
Number less than zero
5
Single numeral from 0 to 9
7
Part of a whole number
9
Steepness of a line