Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 234
t must contain the elevation ofthe polygon. The true shape may be obtained by a rabatment of theplane about its horizontal trace. With centre / describe thearcs aA0, bB0, cC0; these are the elevations of thepaths of A, B, C; and A0, B0\ C0 are the elevations ofthe rabatments of A, B, C. The plans… … % \Cy The true shape may also be obtained by a rabatmentinto the vertical plane; this is equivalent to an auxiliaryplan on tv, and may be determined by applying theprinciples of Art. 170. This is an important problem because it occurs sooften in other problems ; hence the student should makehimself…
