Across
1
Comparison of two quantities
4
Lines that never intersect
7
Total distance around a shape
8
Amount of space an object occupies
9
Space between two intersecting lines
11
Reference line in a graph
Down
2
The number representing nothing
3
Round shape with all points equidistant
5
Proven mathematical statement
6
Math using letters for unknown values
10
Number greater than zero
12
Power to which a number is raised
13
Steepness of a line