Answer:The Wright brothers invented and flew the first airplane in 1903, recognized as "the first sustained and controlled heavier-than-air powered flight". ... Airplanes had a presence in all the major battles of World War II. The first jet aircraft was the German Heinkel He 178 in 1939.
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Explanation:
They are altered by variables such as temperature hence making materials challenging when dealing with them.
Volume=Hh(b1+b2)/2. b1 and b2 are the base of the trapezoid
