Across
1
Number divisible only by 1 and itself
4
Number greater than zero
5
System of ordered marks for measuring
6
Comparison of two quantities
7
Space between two intersecting lines
8
Longest side of a right triangle
11
Single numeral from 0 to 9
Down
1
Parts per hundred
2
Split into equal parts
3
Rectangle with four equal sides
5
Part of a line with two endpoints
9
The number representing nothing
10
Sum divided by count