Across
1
Line segment connecting two circle points
3
Closed shape with straight sides
4
Repeated addition
5
Math using letters for unknown values
7
Reference line in a graph
10
Number that divides evenly into another
11
Rectangle with four equal sides
Down
1
Value that does not change
2
Mathematical rule or equation
3
Lines that never intersect
6
Middle value in an ordered dataset
8
Part of a line with two endpoints
9
Sum divided by count
12
Single numeral from 0 to 9