Across
1
Line crossing from corner to corner
4
Result of multiplication
5
Single numeral from 0 to 9
6
Exact correspondence on both sides
7
Total distance around a shape
11
Power to which a number is raised
Down
2
Three-sided polygon
3
Line touching circle at one point
6
System of ordered marks for measuring
8
Part of a whole number
9
Amount of space an object occupies
10
Sum divided by count