Across
1
Collection of distinct elements
3
Exact correspondence on both sides
4
Power to which a number is raised
5
Mathematical statement of equality
7
Reference line in a graph
8
Distance from center to edge of circle
Down
1
Steepness of a line
2
Total distance around a shape
6
Number greater than zero
9
Longest side of a right triangle
10
Corner point of a polygon
11
The number representing nothing