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.
The Wright Brothers First Flight Wasn't the First Flight. In a startling announcement a few days ago, Jane's All the World's Aircraft has named an August 1901 flight by Connecticut aviation pioneer Gustave Whitehead as the first successful powered flight in history, beating the Wright brothers' first flight by more than two years.