Across
1
Sum divided by count
6
Steepness of a line
7
Part of a line with two endpoints
8
Line touching circle at one point
Down
2
Middle value in an ordered dataset
3
Longest side of a right triangle
4
Corner point of a polygon
5
Value that does not change
9
Reference line in a graph
10
Number divisible only by 1 and itself
11
Proven mathematical statement
12
Closed shape with straight sides
13
Parts per hundred