Across
1
Steepness of a line
4
Rectangle with four equal sides
5
Middle value in an ordered dataset
9
Corner point of a polygon
10
Three-sided polygon
11
Single numeral from 0 to 9
12
Math using letters for unknown values
13
Result of multiplication
Down
1
Collection of distinct elements
2
Part of a whole number
3
Amount of space an object occupies
6
Comparison of two quantities
7
Sum divided by count
8
Divisible by two