Across
1
Reference line in a graph
3
Math using letters for unknown values
5
Closed shape with straight sides
6
Divisible by two
9
Number less than zero
Down
2
System of ordered marks for measuring
4
Mathematical statement of equality
7
Longest side of a right triangle
8
Middle value in an ordered dataset
10
Number with digits after a point
11
Part of a whole number
12
Space between two intersecting lines