Across
1
Rectangle with four equal sides
4
Exact correspondence on both sides
5
Number that divides evenly into another
7
Part of a line with two endpoints
8
Sum divided by count
10
Number with digits after a point
12
Closed shape with straight sides
Down
2
Line segment connecting two circle points
3
Mathematical statement of equality
6
Corner point of a polygon
9
Difference between highest and lowest values
11
Split into equal parts