Across
1
Symbol representing unknown value
5
Distance from center to edge of circle
8
Part of a circle's circumference
9
Number greater than zero
10
Result of multiplication
Down
2
Single numeral from 0 to 9
3
Number divisible only by 1 and itself
4
System of ordered marks for measuring
6
Value that does not change
7
Line segment connecting two circle points
11
Split into equal parts