Across
1
Middle value in an ordered dataset
3
Collection of distinct elements
5
Part of a whole number
8
Parts per hundred
9
Steepness of a line
10
Mathematical statement of equality
12
Three-sided polygon
Down
2
Power to which a number is raised
4
Line touching circle at one point
6
Line crossing from corner to corner
7
Proven mathematical statement
9
Result of addition
11
Repeated addition
13
Number with digits after a point