Across
1
Part of a circle's circumference
2
Longest side of a right triangle
3
Value that does not change
4
Line touching circle at one point
7
Split into equal parts
9
Part of a line with two endpoints
11
Line crossing from corner to corner
Down
1
Sum divided by count
5
Repeated addition
6
Number greater than zero
8
Total distance around a shape
10
Distance from center to edge of circle