Across
1
Space between two intersecting lines
3
Steepness of a line
4
Total distance around a shape
9
Line segment connecting two circle points
10
Power to which a number is raised
12
Line crossing from corner to corner
Down
2
Proven mathematical statement
3
Collection of distinct elements
5
Visual representation of data
6
Middle value in an ordered dataset
7
Three-sided polygon
8
The number representing nothing
11
Amount of space an object occupies
13
Parts per hundred