Across
1
Single numeral from 0 to 9
3
The number representing nothing
4
Visual representation of data
6
Number less than zero
7
Result of multiplication
9
Longest side of a right triangle
10
Space between two intersecting lines
Down
2
Sum divided by count
5
Number that divides evenly into another
7
Result of raising a number to an exponent
8
Line touching circle at one point
11
System of ordered marks for measuring
12
Line crossing from corner to corner