Across
1
Symbol representing unknown value
4
Collection of distinct elements
5
Amount of space an object occupies
7
Longest side of a right triangle
8
Divisible by two
12
Single numeral from 0 to 9
14
Corner point of a polygon
Down
2
Sum divided by count
3
Power to which a number is raised
6
Line touching circle at one point
9
Part of a line with two endpoints
10
Math using letters for unknown values
11
Number that divides evenly into another
13
Middle value in an ordered dataset