Across
1
Distance from center to edge of circle
4
Corner point of a polygon
5
Reference line in a graph
8
Visual representation of data
9
The number representing nothing
12
Difference between highest and lowest values
14
Round shape with all points equidistant
Down
2
Line segment connecting two circle points
3
Number less than zero
6
Exact correspondence on both sides
7
Split into equal parts
10
Line touching circle at one point
11
System of ordered marks for measuring
13
Power to which a number is raised
15
Comparison of two quantities