Across
1
Closed shape with straight sides
2
Reference line in a graph
3
Collection of distinct elements
4
Line touching circle at one point
6
Exact correspondence on both sides
8
Round shape with all points equidistant
9
Mathematical statement of equality
10
Three-sided polygon
Down
1
Number greater than zero
3
Part of a line with two endpoints
4
Proven mathematical statement
5
Math using letters for unknown values
7
Symbol representing unknown value
11
U-shaped curve of a quadratic function