Across
1
Line touching circle at one point
4
Reference line in a graph
5
Distance from center to edge of circle
7
Symbol representing unknown value
8
Number with digits after a point
12
Part of a whole number
Down
2
Sum divided by count
3
Number that divides evenly into another
6
Collection of distinct elements
9
Result of addition
10
Three-sided polygon
11
Parts per hundred
13
Longest side of a right triangle
14
Part of a circle's circumference