Across
1
Power to which a number is raised
3
Reference line in a graph
5
System of ordered marks for measuring
7
Steepness of a line
8
Split into equal parts
9
Lines that never intersect
10
Collection of distinct elements
12
Number with digits after a point
Down
1
Divisible by two
2
Three-sided polygon
4
Number greater than zero
6
Line segment connecting two circle points
9
Total distance around a shape
11
Proven mathematical statement