Across
1
Mathematical statement of equality
2
Lines that never intersect
5
Steepness of a line
6
Math using letters for unknown values
7
Part of a line with two endpoints
12
Number greater than zero
Down
2
Result of multiplication
3
Symbol representing unknown value
4
Amount of space an object occupies
8
The number representing nothing
9
Reference line in a graph
10
Line crossing from corner to corner
11
Number divisible only by 1 and itself