Across
1
Proven mathematical statement
5
Part of a circle's circumference
6
Amount of space an object occupies
7
Number with digits after a point
8
Lines that never intersect
9
Line touching circle at one point
12
Part of a whole number
Down
2
Number less than zero
3
The number representing nothing
4
Mathematical statement of equality
10
Sum divided by count
11
Line segment connecting two circle points
12
Mathematical rule or equation
13
Space between two intersecting lines