Across
1
Total distance around a shape
4
Collection of distinct elements
6
Power to which a number is raised
8
Line crossing from corner to corner
9
The number representing nothing
11
Part of a circle's circumference
Down
1
Closed shape with straight sides
2
Mathematical statement of equality
3
Number that divides evenly into another
5
Round shape with all points equidistant
7
Exact correspondence on both sides
10
Number with digits after a point
12
U-shaped curve of a quadratic function