Corresponding sides are a pair of matching sides in two different shapes (size does not matter). In the field of geometry, the concept of corresponding sides plays an important role to prove various triangular theorems.
The Boeing B-17 Flying Fortress is a four-engine heavy bomber aircraft developed in the 1930s for the United States Army Air Corps (USAAC).
The Hercules is the largest flying boat ever built and has the largest wingspan of any aircraft in history. It remains in good condition and is on display at the Evergreen Aviation & Space Museum in McMinnville, Oregon, United States.