Across
1
Rectangular array of numbers
2
Line touching circle at one point
6
Sum divided by count
7
Result of multiplication
8
Round shape with all points equidistant
9
Number less than zero
Down
2
Proven mathematical statement
3
Mathematical rule or equation
4
Part of a circle's circumference
5
Single numeral from 0 to 9
10
Line segment connecting two circle points
11
Number greater than zero
12
Corner point of a polygon
13
Collection of distinct elements