Across
1
Reference line in a graph
2
Split into equal parts
4
Rectangle with four equal sides
5
Closed shape with straight sides
6
Single numeral from 0 to 9
7
Difference between highest and lowest values
8
Mathematical statement of equality
Down
2
Line crossing from corner to corner
3
Collection of distinct elements
4
Part of a line with two endpoints
9
Result of multiplication
10
Number divisible only by 1 and itself