Across
1
Symbol representing unknown value
3
Number that divides evenly into another
5
Line touching circle at one point
6
Math using letters for unknown values
9
Corner point of a polygon
Down
2
Difference between highest and lowest values
3
Mathematical rule or equation
4
Space between two intersecting lines
7
Lines that never intersect
8
Split into equal parts
10
Collection of distinct elements
11
Divisible by two