Across
1
Split into equal parts
2
Rectangle with four equal sides
5
Part of a whole number
7
Number that divides evenly into another
9
The number representing nothing
11
Number greater than zero
Down
2
Exact correspondence on both sides
3
Line segment connecting two circle points
4
Divisible by two
6
Corner point of a polygon
8
Part of a line with two endpoints
10
Math using letters for unknown values