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 Flying Tigers were a group of American fighter pilots that flew for China in the early part of 1942. Led by a controversial American, Colonel Claire Chennault, they were actually called the American Volunteer Group (AVG), and achieved good success in their aerial battles against the Japanese.