Across
1
Symbol representing unknown value
5
Exact correspondence on both sides
6
Longest side of a right triangle
7
Split into equal parts
8
Three-sided polygon
Down
2
Number greater than zero
3
Round shape with all points equidistant
4
Collection of distinct elements
9
Reference line in a graph
10
Comparison of two quantities
11
Number divisible only by 1 and itself