Across
1
Reference line in a graph
4
Power to which a number is raised
5
Exact correspondence on both sides
6
Mathematical statement of equality
7
Proven mathematical statement
8
Lines that never intersect
12
Number greater than zero
Down
2
Mathematical rule or equation
3
System of ordered marks for measuring
9
Steepness of a line
10
Corner point of a polygon
11
Repeated addition
12
Number divisible only by 1 and itself