Across
1
Corner point of a polygon
3
Mathematical rule or equation
4
Exact correspondence on both sides
6
Single numeral from 0 to 9
8
Number greater than zero
9
Value that does not change
Down
2
Middle value in an ordered dataset
4
Collection of distinct elements
5
Distance from center to edge of circle
7
Proven mathematical statement
10
Total distance around a shape
11
Part of a line with two endpoints