Across
1
Symbol representing unknown value
4
System of ordered marks for measuring
5
Line segment connecting two circle points
6
Visual representation of data
7
Power to which a number is raised
11
Round shape with all points equidistant
12
Amount of space an object occupies
Down
2
Space between two intersecting lines
3
Result of raising a number to an exponent
4
Collection of distinct elements
8
Total distance around a shape
9
The number representing nothing
10
Middle value in an ordered dataset