Across
1
Round shape with all points equidistant
5
Line touching circle at one point
6
Visual representation of data
7
Three-sided polygon
9
Value that does not change
Down
2
Part of a whole number
3
Total distance around a shape
4
Exact correspondence on both sides
8
Single numeral from 0 to 9
10
Lines that never intersect
11
Symbol representing unknown value