Across
1
Closed shape with straight sides
3
Result of addition
4
Round shape with all points equidistant
5
Total distance around a shape
7
Part of a circle's circumference
8
Repeated addition
9
Sum divided by count
10
Reference line in a graph
11
Divisible by two
Down
2
Mathematical statement of equality
5
Number greater than zero
6
Distance from center to edge of circle
7
Space between two intersecting lines