Across
1
Closed shape with straight sides
4
Divisible by two
5
Round shape with all points equidistant
8
Result of multiplication
9
Collection of distinct elements
11
Reference line in a graph
Down
1
Number greater than zero
2
Space between two intersecting lines
3
Number that divides evenly into another
6
Part of a circle's circumference
7
Number divisible only by 1 and itself
10
Symbol representing unknown value