Across
1
Line touching circle at one point
6
System of ordered marks for measuring
7
Round shape with all points equidistant
8
Lines that never intersect
9
Rectangle with four equal sides
10
Part of a line with two endpoints
11
Difference between highest and lowest values
Down
2
Reference line in a graph
3
Power to which a number is raised
4
Divisible by two
5
Total distance around a shape
6
Exact correspondence on both sides