Across
1
Line segment connecting two circle points
3
Line touching circle at one point
6
Number divisible only by 1 and itself
9
Line crossing from corner to corner
10
Number less than zero
11
Mathematical rule or equation
13
Total distance around a shape
Down
2
The number representing nothing
4
Number that divides evenly into another
5
Comparison of two quantities
7
Middle value in an ordered dataset
8
Number with digits after a point
12
Distance from center to edge of circle