Across
1
Rectangular array of numbers
4
Round shape with all points equidistant
7
Repeated addition
8
Number greater than zero
9
Amount of space an object occupies
Down
2
Part of a line with two endpoints
3
Result of raising a number to an exponent
5
Part of a circle's circumference
6
Line segment connecting two circle points
10
Lines that never intersect
11
The number representing nothing