Across
1
Three-sided polygon
3
Single numeral from 0 to 9
5
Mathematical rule or equation
6
Number less than zero
7
Amount of space an object occupies
Down
2
System of ordered marks for measuring
3
Line crossing from corner to corner
4
Result of multiplication
8
Sum divided by count
9
Number that divides evenly into another
10
Parts per hundred
11
Closed shape with straight sides