Across
1
Line touching circle at one point
5
Math using letters for unknown values
6
Line segment connecting two circle points
7
System of ordered marks for measuring
9
Space between two intersecting lines
10
Proven mathematical statement
Down
2
Lines that never intersect
3
Collection of distinct elements
4
Part of a whole number
5
Sum divided by count
8
Longest side of a right triangle
9
Reference line in a graph