Across
1
Rectangular array of numbers
3
Closed shape with straight sides
4
Mathematical statement of equality
7
Symbol representing unknown value
8
Reference line in a graph
9
Number greater than zero
11
Line segment connecting two circle points
Down
2
Mathematical rule or equation
5
Value that does not change
6
Space between two intersecting lines
8
Part of a circle's circumference
10
Comparison of two quantities