A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 347
wo sides and the base ofthe pyramid, the section is a triangle.Fig. 35 Any other section is a polygon having sides unequal in length, but equal in number to the sides ofthe polygon forming the base of the pyramid. Explanation.—The projections of this solid and its sec-tions do not differ materially… … §15 PRACTICAL PROJECTION 77 arc C a being measured in a similar manner. This drawingmay be more accurately made if the edges of the i)yramidare continued by dotted lines to the vertex O in the fnmtelevations, as shown on the plate. A comparison of the•reference letters in the different views on the…
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-55-82.webp)