Across
1
Total distance around a shape
6
Distance from center to edge of circle
7
Sum divided by count
8
Number with digits after a point
11
Steepness of a line
12
Middle value in an ordered dataset
13
Reference line in a graph
Down
2
Exact correspondence on both sides
3
Repeated addition
4
Single numeral from 0 to 9
5
Rectangle with four equal sides
9
U-shaped curve of a quadratic function
10
System of ordered marks for measuring
14
Part of a line with two endpoints