Across
1
Repeated addition
2
Comparison of two quantities
4
Number less than zero
7
Part of a circle's circumference
10
Value that does not change
11
Middle value in an ordered dataset
12
Number with digits after a point
Down
2
Distance from center to edge of circle
3
Round shape with all points equidistant
5
Space between two intersecting lines
6
Line crossing from corner to corner
8
The number representing nothing
9
Result of raising a number to an exponent