Across
1
Line touching circle at one point
4
Line segment connecting two circle points
7
Space between two intersecting lines
8
Line crossing from corner to corner
9
Sum divided by count
Down
2
Steepness of a line
3
Mathematical rule or equation
5
Rectangular array of numbers
6
Number with digits after a point
10
Closed shape with straight sides
11
Exact correspondence on both sides
12
Difference between highest and lowest values
13
Rectangle with four equal sides