Across
1
Total distance around a shape
7
Part of a circle's circumference
8
Distance from center to edge of circle
10
Part of a line with two endpoints
11
Number greater than zero
13
Line crossing from corner to corner
Down
2
Steepness of a line
3
Line segment connecting two circle points
4
Power to which a number is raised
5
Line touching circle at one point
6
Mathematical statement of equality
9
Rectangular array of numbers
12
Number that divides evenly into another