Across
1
Lines that never intersect
5
Number divisible only by 1 and itself
7
Amount of space an object occupies
8
Result of multiplication
9
Line crossing from corner to corner
10
Number less than zero
Down
2
Distance from center to edge of circle
3
Mathematical statement of equality
4
The number representing nothing
6
Proven mathematical statement
8
Parts per hundred
11
Symbol representing unknown value
12
Space between two intersecting lines