Across
1
Result of addition
3
Sum divided by count
4
Math using letters for unknown values
8
Middle value in an ordered dataset
9
Result of multiplication
11
Three-sided polygon
12
Round shape with all points equidistant
Down
2
Mathematical rule or equation
5
Power to which a number is raised
6
U-shaped curve of a quadratic function
7
Number with digits after a point
10
Number greater than zero
13
Repeated addition