Across
1
Result of addition
3
Total distance around a shape
4
Three-sided polygon
6
Steepness of a line
7
Number with digits after a point
8
Sum divided by count
Down
2
Rectangular array of numbers
4
Proven mathematical statement
5
Line touching circle at one point
6
Part of a line with two endpoints
9
Line segment connecting two circle points
10
Line crossing from corner to corner