Across
1
Single numeral from 0 to 9
2
Math using letters for unknown values
3
Number divisible only by 1 and itself
4
Line segment connecting two circle points
6
Closed shape with straight sides
8
Line touching circle at one point
Down
2
Reference line in a graph
3
Parts per hundred
5
Divisible by two
6
Result of raising a number to an exponent
7
Comparison of two quantities