Across
1
Math using letters for unknown values
4
Number greater than zero
5
System of ordered marks for measuring
6
Split into equal parts
7
Middle value in an ordered dataset
9
Part of a line with two endpoints
10
Line touching circle at one point
11
Collection of distinct elements
Down
2
Parts per hundred
3
Mathematical statement of equality
4
Lines that never intersect
8
Reference line in a graph