Across
1
Number that divides evenly into another
5
Round shape with all points equidistant
6
Rectangular array of numbers
7
Value that does not change
12
Result of raising a number to an exponent
13
Symbol representing unknown value
Down
2
Proven mathematical statement
3
Reference line in a graph
4
Sum divided by count
8
Line touching circle at one point
9
Part of a whole number
10
Collection of distinct elements
11
Repeated addition