Across
1
Parts per hundred
4
Part of a circle's circumference
7
Mathematical statement of equality
8
Number that divides evenly into another
10
System of ordered marks for measuring
11
Collection of distinct elements
12
Number divisible only by 1 and itself
Down
1
Result of multiplication
2
Part of a whole number
3
Lines that never intersect
5
Total distance around a shape
6
Difference between highest and lowest values
9
Line crossing from corner to corner