Across
1
Number with digits after a point
2
Result of raising a number to an exponent
3
Collection of distinct elements
5
System of ordered marks for measuring
6
The number representing nothing
7
Power to which a number is raised
8
Comparison of two quantities
Down
1
Single numeral from 0 to 9
2
Number greater than zero
4
Distance from center to edge of circle
5
Rectangle with four equal sides
9
Line touching circle at one point