Across
1
Rectangle with four equal sides
4
Math using letters for unknown values
5
Line touching circle at one point
6
Symbol representing unknown value
8
Number greater than zero
9
Line segment connecting two circle points
Down
1
Collection of distinct elements
2
Lines that never intersect
3
Round shape with all points equidistant
7
Mathematical statement of equality
10
Power to which a number is raised
11
Number divisible only by 1 and itself