Across
1
Total distance around a shape
4
Line touching circle at one point
6
Parts per hundred
Down
1
Lines that never intersect
2
Line segment connecting two circle points
3
Value that does not change
5
Difference between highest and lowest values
7
Rectangular array of numbers
8
Single numeral from 0 to 9
9
Part of a line with two endpoints
10
Exact correspondence on both sides
11
Round shape with all points equidistant