Across
1
Distance from center to edge of circle
4
Line touching circle at one point
5
Line crossing from corner to corner
6
Three-sided polygon
10
Result of multiplication
Down
2
Single numeral from 0 to 9
3
Number that divides evenly into another
7
Part of a circle's circumference
8
Lines that never intersect
9
Divisible by two
11
Number less than zero
12
Value that does not change