Geometria pura elementare, per S. Pincherle.

26 Geometria piana. PROBLEMA 5. Ad una data linea retta AB e per un punto C preso fuori di essa condurre la perpendicolare. Dal centro C e con raggio C1D abbastanza grande per attraversare la AB si descriva una circonferenza che seghi la AB in E, F; si divida C A E '^-,. F B Fig. 18. la EF per meta in G (1) e si congiunga CG, CF, CE. I due triangoli CGE, CGF avendo CE= CF come raggi dello stesso cerchio, CG comune, GE= GF, saranno eguali (2) e sara CGE - CGF, cioe (3) la CG 6 perpendicolare alla AB, c. d. d. ~ IV. Proposizioni sui triangoli. DEFINIZIONE. Angolo esterno di un poligono e 1'angolo formato da un lato col prolungamento del lato consecutivo. (1) Probl. 3. (2) ~ II, teor. 5. (3) ~ I, def. 3.

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Title
Geometria pura elementare, per S. Pincherle.
Author
Pincherle, Salvatore, 1853-1936.
Canvas
Page 12
Publication
Milano,: U. Hoepli,
1895.
Subject terms
Geometry

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"Geometria pura elementare, per S. Pincherle." In the digital collection University of Michigan Historical Math Collection. https://name.umdl.umich.edu/acv2273.0001.001. University of Michigan Library Digital Collections. Accessed April 30, 2025.
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