Across
1
Longest side of a right triangle
5
Reference line in a graph
8
Line crossing from corner to corner
9
Rectangle with four equal sides
12
Divisible by two
Down
2
Visual representation of data
3
Steepness of a line
4
Collection of distinct elements
5
Math using letters for unknown values
6
Single numeral from 0 to 9
7
Part of a whole number
10
Rectangular array of numbers
11
Mathematical statement of equality