Across
1
Round shape with all points equidistant
4
Collection of distinct elements
6
Number with digits after a point
7
Line segment connecting two circle points
8
Space between two intersecting lines
9
Comparison of two quantities
10
Three-sided polygon
11
Total distance around a shape
Down
2
Lines that never intersect
3
Line crossing from corner to corner
5
Power to which a number is raised
12
Exact correspondence on both sides