Straight distance between two towns 
The map shows the distance of four towns as shown in the figure. Compare quantity A with quantity B.
Straight distance between Austen and Seburg
B: Straight distance between Coaltown and Woodland
Is quantity B always greater than quantity A?  
What I think is that if Austen=A, Coaltown=C, Seburg=S and Woodland=W then |18-x|< AS< |18+s| and |19-x|< CW< |19+x|. So, AS and CW can vary. But, my instinct says CW>AS.
