Across
1
Single numeral from 0 to 9
2
Part of a circle's circumference
3
Sum divided by count
5
U-shaped curve of a quadratic function
6
Repeated addition
9
Number greater than zero
Down
2
Math using letters for unknown values
4
Rectangular array of numbers
5
Parts per hundred
7
Reference line in a graph
8
Number with digits after a point
10
Line segment connecting two circle points