Across
1
Longest side of a right triangle
4
Rectangular array of numbers
6
Space between two intersecting lines
9
Mathematical statement of equality
10
Sum divided by count
12
Exact correspondence on both sides
13
Steepness of a line
14
Divisible by two
Down
2
Distance from center to edge of circle
3
The number representing nothing
5
Power to which a number is raised
7
Number with digits after a point
8
Middle value in an ordered dataset
11
Math using letters for unknown values