Across
1
Number with digits after a point
4
The number representing nothing
7
Part of a line with two endpoints
8
Divisible by two
9
Line touching circle at one point
10
Repeated addition
12
Round shape with all points equidistant
Down
2
Collection of distinct elements
3
Comparison of two quantities
5
Number greater than zero
6
Lines that never intersect
11
Part of a whole number