Across
1
Single numeral from 0 to 9
2
Parts per hundred
3
Total distance around a shape
4
Collection of distinct elements
5
Middle value in an ordered dataset
9
Part of a circle's circumference
Down
1
Split into equal parts
2
Number greater than zero
4
System of ordered marks for measuring
6
Result of addition
7
Lines that never intersect
8
Steepness of a line