Across
1
Result of multiplication
4
Space between two intersecting lines
7
Closed shape with straight sides
8
Round shape with all points equidistant
9
Collection of distinct elements
10
Line segment connecting two circle points
11
Lines that never intersect
Down
2
Mathematical rule or equation
3
Line crossing from corner to corner
5
Single numeral from 0 to 9
6
Power to which a number is raised
12
Middle value in an ordered dataset
13
Steepness of a line
14
Sum divided by count