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An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth (1888)

Gwilt, Joseph, 1784-1863, Papworth, Wyatt Angelicus Van Sandau, 1822-1894 · London Longmans, Green · leaf 1016

An illustration from An encyclopaedia of architecture, historical, theoretical, & practical. New ed., rev., portions rewritten, and with additions by Wyatt Papworth, 1888, leaf 1016
mmedately seen tliat the interior angles in tlie equilateral triangle, thepentagon, the hexagon, the nonagon, and the dodecagon, are divisible by the sides so as to clear the result of frac-tions. Thus, in theequilateral triangle, thenumber of degrees sub-tended by the sides isG0°. In the…

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