Across
1
Symbol representing unknown value
2
Collection of distinct elements
4
Single numeral from 0 to 9
7
Distance from center to edge of circle
8
Number that divides evenly into another
9
Number with digits after a point
10
Sum divided by count
Down
1
Corner point of a polygon
2
Part of a line with two endpoints
3
Round shape with all points equidistant
5
System of ordered marks for measuring
6
Exact correspondence on both sides