Across
1
Round shape with all points equidistant
4
Distance from center to edge of circle
5
Power to which a number is raised
6
Mathematical rule or equation
8
Part of a line with two endpoints
Down
2
Line touching circle at one point
3
Three-sided polygon
7
Single numeral from 0 to 9
9
Reference line in a graph
10
Sum divided by count
11
Corner point of a polygon