Across
1
The number representing nothing
3
Number less than zero
4
Result of multiplication
5
Distance from center to edge of circle
8
Longest side of a right triangle
12
Repeated addition
Down
2
Split into equal parts
4
Result of raising a number to an exponent
6
Collection of distinct elements
7
Steepness of a line
9
Mathematical statement of equality
10
Divisible by two
11
Number with digits after a point