Across
1
Reference line in a graph
4
Corner point of a polygon
5
Repeated addition
6
Line segment connecting two circle points
8
Lines that never intersect
9
Sum divided by count
11
Value that does not change
12
Number less than zero
Down
2
Line touching circle at one point
3
Part of a whole number
7
Three-sided polygon
8
Closed shape with straight sides
10
Visual representation of data
13
Rectangle with four equal sides