Across
1
Corner point of a polygon
4
Middle value in an ordered dataset
5
Number less than zero
7
Math using letters for unknown values
10
Result of multiplication
11
Three-sided polygon
13
Part of a circle's circumference
Down
2
Parts per hundred
3
Rectangle with four equal sides
6
Result of raising a number to an exponent
8
Space between two intersecting lines
9
Line crossing from corner to corner
12
Number that divides evenly into another