Across
1
Value that does not change
3
Amount of space an object occupies
5
Steepness of a line
7
Number greater than zero
8
Part of a line with two endpoints
9
Divisible by two
10
Part of a circle's circumference
11
Difference between highest and lowest values
Down
1
Line segment connecting two circle points
2
Result of addition
4
Longest side of a right triangle
6
Power to which a number is raised
10
Sum divided by count
12
Closed shape with straight sides