Across
1
Repeated addition
4
Number that divides evenly into another
8
Comparison of two quantities
9
Sum divided by count
10
Part of a circle's circumference
11
Middle value in an ordered dataset
13
Closed shape with straight sides
Down
2
Lines that never intersect
3
Result of addition
5
Line crossing from corner to corner
6
Mathematical rule or equation
7
Value that does not change
12
Symbol representing unknown value