Across
1
Space between two intersecting lines
2
Collection of distinct elements
4
Distance from center to edge of circle
6
Reference line in a graph
7
Repeated addition
9
Middle value in an ordered dataset
11
Symbol representing unknown value
12
Math using letters for unknown values
13
Part of a whole number
Down
2
Exact correspondence on both sides
3
U-shaped curve of a quadratic function
5
Parts per hundred
8
Visual representation of data
10
Split into equal parts
14
Total distance around a shape