Across
1
Part of a line with two endpoints
5
Rectangle with four equal sides
6
Difference between highest and lowest values
7
Symbol representing unknown value
9
Corner point of a polygon
Down
2
Rectangular array of numbers
3
Divisible by two
4
Steepness of a line
8
Collection of distinct elements
10
Split into equal parts
11
Single numeral from 0 to 9