Across
1
Number less than zero
3
Line segment connecting two circle points
6
Single numeral from 0 to 9
7
Visual representation of data
9
Collection of distinct elements
10
Math using letters for unknown values
12
Round shape with all points equidistant
Down
2
Number greater than zero
4
Symbol representing unknown value
5
Corner point of a polygon
8
Longest side of a right triangle
11
Number that divides evenly into another