Éléments de géométrie, par A. M. Legendre, avec additions et modifications, par M. A. Blanchet.
Annotations Tools
LIVRE V II. 269 On voit par IA que les solidites des polyedres circonscrits a la sphere sont entre elles comme les surfaces de ces memes polyedres. Ainsi, la propriete que nous avons demontre pour le cylindre circonscrit est commune a une infinite d'autres corps. On aurait pu remarquer egalement que les surfaces des polygones circonscrits au cercle sont entre elles comme leurs contours. PROPOSITION XVII. PROBLEME, Le segment circulaire BMD etant suppose fig.271. faire une revolution autour d'un diametre exterieura ce segment, trouver la valeur du solide engendre. Abaissez sur l'axe les perpendiculaires BE, DF; du centre C menez CI perpendiculaire sur la corde BD, et tirez les rayons CB, CD. Le solide decrit par le secteur BCA - ~. CB. AE*; le solide decrit par le secteur DCA = w. * 5. CB. AF; done la difference de ces deux solides, ou le solide decrit par le secteur DCB =. CB. (AF - AE) - -. CB. EF. Mais le solide decrit par le triangle isoscele DCB a pour mesure - 7. C1. EF*; done 14. le solide decrit par le segment BMD - w. EF. C GB - CI). Or dans le triangle rectangle GIB, on aCB — I - B I = BD;donc le solide decrit par le segment BMD aura pour mesure Ew. EF. ~ BD; Qou.e BD.EF.
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About this Item
- Title
- Éléments de géométrie, par A. M. Legendre, avec additions et modifications, par M. A. Blanchet.
- Author
- Legendre, A. M. (Adrien Marie), 1752-1833.
- Canvas
- Page 260
- Publication
- Paris,: Firmin-Didot frères,
- 1852.
- Subject terms
- Geometry.
Technical Details
- Link to this Item
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https://name.umdl.umich.edu/acv0786.0001.001
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Cite this Item
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"Éléments de géométrie, par A. M. Legendre, avec additions et modifications, par M. A. Blanchet." In the digital collection University of Michigan Historical Math Collection. https://name.umdl.umich.edu/acv0786.0001.001. University of Michigan Library Digital Collections. Accessed April 30, 2025.