Across
1
Number divisible only by 1 and itself
2
Lines that never intersect
4
Line crossing from corner to corner
5
Round shape with all points equidistant
6
Math using letters for unknown values
7
Symbol representing unknown value
8
Distance from center to edge of circle
9
Divisible by two
Down
1
Total distance around a shape
2
Parts per hundred
3
Part of a whole number