Across
1
Rectangle with four equal sides
2
Lines that never intersect
3
Math using letters for unknown values
4
Three-sided polygon
9
Number greater than zero
10
Power to which a number is raised
11
Proven mathematical statement
Down
2
Parts per hundred
3
Part of a circle's circumference
5
The number representing nothing
6
Amount of space an object occupies
7
Middle value in an ordered dataset
8
Comparison of two quantities