Across
1
Result of addition
3
Round shape with all points equidistant
4
Three-sided polygon
9
Sum divided by count
10
Lines that never intersect
11
Single numeral from 0 to 9
12
Space between two intersecting lines
13
U-shaped curve of a quadratic function
Down
2
Middle value in an ordered dataset
5
Reference line in a graph
6
Number with digits after a point
7
Difference between highest and lowest values
8
Value that does not change
14
Longest side of a right triangle