Across
1
Distance from center to edge of circle
5
Number that divides evenly into another
6
Difference between highest and lowest values
7
Longest side of a right triangle
9
Comparison of two quantities
12
Line touching circle at one point
Down
2
Exact correspondence on both sides
3
Result of multiplication
4
Collection of distinct elements
8
The number representing nothing
10
System of ordered marks for measuring
11
Space between two intersecting lines
13
Reference line in a graph