Across
1
Part of a line with two endpoints
3
System of ordered marks for measuring
4
Round shape with all points equidistant
6
Single numeral from 0 to 9
7
Visual representation of data
8
Math using letters for unknown values
10
Comparison of two quantities
Down
2
The number representing nothing
3
Exact correspondence on both sides
5
Rectangle with four equal sides
6
Number with digits after a point
9
Sum divided by count