Across
1
Rectangular array of numbers
3
Space between two intersecting lines
5
Sum divided by count
7
Result of addition
9
Part of a line with two endpoints
13
Line segment connecting two circle points
Down
2
Part of a whole number
3
Part of a circle's circumference
4
Distance from center to edge of circle
6
Closed shape with straight sides
8
Steepness of a line
10
Middle value in an ordered dataset
11
Power to which a number is raised
12
Single numeral from 0 to 9