Across
1
Middle value in an ordered dataset
4
Result of raising a number to an exponent
5
Single numeral from 0 to 9
7
Line crossing from corner to corner
8
Part of a line with two endpoints
9
Corner point of a polygon
10
Value that does not change
Down
2
Three-sided polygon
3
Number greater than zero
6
Part of a whole number
8
Collection of distinct elements
11
Parts per hundred
12
Mathematical statement of equality
13
Space between two intersecting lines