Across
1
Divisible by two
3
Line crossing from corner to corner
5
Total distance around a shape
7
Number greater than zero
9
The number representing nothing
11
Number that divides evenly into another
Down
2
Part of a whole number
4
Symbol representing unknown value
6
Line touching circle at one point
8
Amount of space an object occupies
10
Proven mathematical statement
12
Space between two intersecting lines