Across
1
Part of a line with two endpoints
3
Line segment connecting two circle points
5
Result of raising a number to an exponent
6
The number representing nothing
7
Closed shape with straight sides
Down
2
Power to which a number is raised
4
Difference between highest and lowest values
5
Number divisible only by 1 and itself
8
Amount of space an object occupies
9
Number with digits after a point