Across
1
Divisible by two
4
Comparison of two quantities
5
Mathematical rule or equation
6
Reference line in a graph
7
Closed shape with straight sides
11
Three-sided polygon
12
Number divisible only by 1 and itself
Down
2
Part of a line with two endpoints
3
Steepness of a line
8
Sum divided by count
9
Line touching circle at one point
10
Space between two intersecting lines