Across
1
Three-sided polygon
3
Middle value in an ordered dataset
5
Total distance around a shape
6
Line segment connecting two circle points
11
Visual representation of data
12
Math using letters for unknown values
Down
2
Lines that never intersect
3
Repeated addition
4
Longest side of a right triangle
7
Line touching circle at one point
8
Single numeral from 0 to 9
9
Symbol representing unknown value
10
Corner point of a polygon