Across
1
Number divisible only by 1 and itself
4
Amount of space an object occupies
5
Sum divided by count
6
Comparison of two quantities
9
Total distance around a shape
10
Line segment connecting two circle points
Down
2
Symbol representing unknown value
3
System of ordered marks for measuring
7
Three-sided polygon
8
Longest side of a right triangle
11
Middle value in an ordered dataset