Across
1
Number greater than zero
4
Difference between highest and lowest values
5
Math using letters for unknown values
11
Line segment connecting two circle points
12
Line touching circle at one point
Down
2
Proven mathematical statement
3
Steepness of a line
6
Distance from center to edge of circle
7
Middle value in an ordered dataset
8
Three-sided polygon
9
Line crossing from corner to corner
10
Amount of space an object occupies
13
Parts per hundred