Semicircle Road Trip #2

If you figured out Semicircle road trip problem #1, you will find this second problem easy. The challenge is setting-up the solution/ explanation and not really in figuring out which road is longer. If you have an explanation, share them in the comment section.


There are two ways to get from Town A to Town B. The blue road goes directly to B and the red one has a few side trips. The routes are semicircular. Which road is longer? Explain your choice.

View the solution.

Your thoughts?