Across
1
Rectangular array of numbers
5
Total distance around a shape
7
Distance from center to edge of circle
8
Sum divided by count
9
Number that divides evenly into another
10
Mathematical statement of equality
11
Mathematical rule or equation
Down
2
Line touching circle at one point
3
Proven mathematical statement
4
Corner point of a polygon
5
U-shaped curve of a quadratic function
6
The number representing nothing
12
Round shape with all points equidistant
13
Part of a whole number