Across
1
Distance from center to edge of circle
2
Number divisible only by 1 and itself
3
Divisible by two
5
Part of a line with two endpoints
10
Mathematical rule or equation
11
Number that divides evenly into another
Down
2
Number greater than zero
4
Corner point of a polygon
6
Value that does not change
7
Single numeral from 0 to 9
8
Result of addition
9
Symbol representing unknown value