Across
1
Round shape with all points equidistant
5
Line segment connecting two circle points
6
Comparison of two quantities
7
Power to which a number is raised
9
Result of addition
11
Lines that never intersect
13
Value that does not change
Down
2
Repeated addition
3
Parts per hundred
4
Total distance around a shape
8
Longest side of a right triangle
10
Reference line in a graph
12
Space between two intersecting lines