The parallel sides are called the bases of the trapezoid and the other two sides are called the legs or the lateral sides (if they are not parallel; otherwise there are two pairs of bases). A scalene trapezoid is a trapezoid with no sides of equal measure, in contrast to the special cases below.
It was designed and built by the Wright brothers. They flew it four times on December 17, 1903, near Kill Devil Hills, about four miles south of Kitty Hawk, North Carolina, US. Today, the airplane is exhibited in the National Air and Space Museum in Washington D.C.
Where and when did the Wright Brothers' first flight take place? Orville and Wilbur Wright flew the first airplane on December 17,  1903, at Kill Devil Hills in North Carolina.The flight lasted 12  seconds.he first turbo jet flight took place on August 27, 1939 in  Germany. The jet was a Heinkel He 178 and the pilot's name was  Erich Warsitz.