Area of a circle inscribe a hexagon. Cut the hexagon into six triangles by splitting it from the center. Two opposite triangles both touch two common diameters; slide them along one so the radial edges are adjacent. They now form a parallelogram, with the hexagon sides making two opposite edges, one of which is the base, "s". Two radial edges form slanted sides, and the height, "h" is equal to its apothem (as in the Archimedes proof). In fact, we can assemble all the triangles into one big parallelogram by putting successive pairs next to each other. The same is true if we increase
A Plane Is Born A Plane Is Born A Plane is Born, presented by Mark Evans, was a 15 part series for Discovery Home and Leisure (now Discovery Real Time), in which he not only learned to fly but also built his own Europa two-seater aeroplane. During the course of the series, he tackled everything from the composite control surfaces to the installation of the engine. The series took the viewer for the first time through the step-by-step process of building a 200 mph kit aircraft, capable of flying from England to the South of France on a single tank of fuel. - Research