Across
1
Math using letters for unknown values
5
Line touching circle at one point
6
Line crossing from corner to corner
7
Round shape with all points equidistant
8
Number less than zero
10
Proven mathematical statement
Down
2
Number that divides evenly into another
3
Collection of distinct elements
4
Value that does not change
9
Number divisible only by 1 and itself
11
Difference between highest and lowest values