Across
1
Part of a whole number
4
Sum divided by count
5
Number less than zero
6
Lines that never intersect
9
Value that does not change
12
Line segment connecting two circle points
13
Round shape with all points equidistant
14
Number divisible only by 1 and itself
15
Number that divides evenly into another
Down
2
Longest side of a right triangle
3
The number representing nothing
7
Number with digits after a point
8
Collection of distinct elements
10
Power to which a number is raised
11
Rectangle with four equal sides