Across
1
Corner point of a polygon
3
Number divisible only by 1 and itself
4
Single numeral from 0 to 9
6
The number representing nothing
7
Part of a line with two endpoints
Down
2
Line touching circle at one point
3
Total distance around a shape
5
Steepness of a line
8
Line segment connecting two circle points
9
Amount of space an object occupies
10
Number less than zero