Hendecagon of a regular hendecagon is still impossible even with the usage of an angle trisector. It can, however, be constructed via neusis construction and also via two-fold origami. Close approximations to the regular hendecagon can be constructed, however. For instance, the ancient Greek mathematicians approximated the side length of a hendecagon inscribed in a unit circle as being 14/25 units long. The following construction description is given by T. Drummond from 1800: On a unit circle: The "regular hendecagon" has Dih symmetry, order 22. Since 11 is a prime number there is one subgroup with dihedral symmetry: Dih, and 2
How Long, How Long Blues How Long, How Long Blues "How Long, How Long Blues" (also known as "How Long Blues" or "How Long How Long") is a blues song recorded by the American blues duo Leroy Carr and Scrapper Blackwell in 1928. The song became "an instant best-seller" and one of the first blues standards, inspiring many blues songs of the era. It has been recorded by many artists, not only in blues but also country and western, pop, and jazz. "How Long, How Long Blues" is based on "How Long Daddy", recorded in 1925 by Ida Cox with Papa Charlie Jackson. Leroy Carr