Across
1
Part of a circle's circumference
3
Result of addition
4
Number that divides evenly into another
6
Split into equal parts
9
Line segment connecting two circle points
10
Line touching circle at one point
Down
2
Distance from center to edge of circle
5
Comparison of two quantities
7
Middle value in an ordered dataset
8
Single numeral from 0 to 9
11
Corner point of a polygon
12
The number representing nothing