Across
1
Rectangular array of numbers
3
The number representing nothing
5
Part of a line with two endpoints
6
Longest side of a right triangle
11
Line crossing from corner to corner
Down
1
Repeated addition
2
Split into equal parts
4
Comparison of two quantities
7
Mathematical statement of equality
8
Middle value in an ordered dataset
9
Steepness of a line
10
Math using letters for unknown values