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

I

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lC- rot( — ) - = ---,
' l v 4t.A '.IB ( ep.C Y e.D -c
1, At B2+ CZ+ + D A 2 A B CY+ AC CX -
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I (3) Ap+3s + Cr+S = s3K.
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A B CD
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48.

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/. i0 ( — )B C C co DA + D B AC + A co C D
7 \^7/C (IJ) (3e) C = & co AB -+ L C B + B C'7 DAD [ (^. D - A c< BC+ B Cg cCA- i c' AB;,c8d,'l ~ n co077CitL -Le/ zior. 1eziianltZ eAnl'ael ied eniXe les^Co 1L- lerajAJ L>e-1 CoC CD C D B Coo BC
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o PD coA DA - Cc A B
C B C co CA coa AS -
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() // w 3 ir <ovL\ ( XX ^= Jr - CD Y Z = 'J- AD
X z M-D YT -K AC
/ '/ \X (1Cc (1t) i XZ = JT; ) B I YT = 'jr- AC!
A (x — ---- -
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1 CD XY Ca XZ cr XT
C (YX cm -YZ Cr,7YT
c. ZX c, ZY -t c ZT T
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Pie *e,. _t, /,. =. IQ,. 3tB C;
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