Principes de la géométrie analytique. Géométrie de l'espace, par L. Painvin.

19

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i / I:;.A=-A3CA= cDtCCrDBt-D C CBC.
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AB, Be, CD, DA,
Jo-tcii' /eCe/h4enleqzk pepeviau1ivceS ezt L/-ceLS
cbD', Db'A', AB'o' Bb'oA'
C,3B,1D,, DCA, A:D,B,B,ClA,.
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BCAB, CDAB, DA,AB
f e-DI -Z BI I e /,
a~ C:) i, ':B, i alBa~C:,
t,,/, J. A,'B~_ >, s,. 4~".' 0 ) ^e;< _ —
C(9 A= BCc,, - +CD DB,+DA c 3,C,.
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(3) A,= CB (" CD, +C', DI,. B, D, DCo B1C,.
Ot2ia ndone en ae/iZ?&l dci 6 iL-ca l yJ ---imed?e DeS;.-Sc
I AB BCC, -D,+ CDD ( D,ttDA C B3, C ( 7 Co -, 4- C., B+ D, B;
j BC= CD CZAD,+ DA 7o CA,1t+ AjBCDC, C I s Co A, + D,CCs+ A, ^ A,
' CD D A CmAC AB,+AB Ce BD,+ BlC ( A^,I, I' C + -S C A1;

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