Across
1
Line crossing from corner to corner
6
Rectangular array of numbers
8
Single numeral from 0 to 9
9
Closed shape with straight sides
10
Exact correspondence on both sides
11
Visual representation of data
Down
2
Result of multiplication
3
The number representing nothing
4
Part of a whole number
5
Part of a circle's circumference
6
Repeated addition
7
Lines that never intersect