B0B0 d α X 0 X C0C0 C. B A0A0 A Y0Y0 Y 1.(B 0 C 0 ). 2.(A 0 X 0 ). 3.(B 0 C 0 ) (A 0 X 0 )=Y 0. 4.(ВС). 5.(YY 0 ) (AA 0 ). 6.Y = (BC) (YY 0 ). 7.(AY) d=X

... M P N (X 0 ) X (Y 0 ) Y 1.(N 0 P 0 )(C 0 A 0 )=Y 0 2.(NP)(YY 0 )=Y 3.(MY)[AA 0 ]=X 4.(XN)[BB 0 ]=K 5.[MN] 6.(XP)[DD 0 ]=L XKML - сечение A0A0 C0C0 P0P0 N0N0 K L D0D0 D C B A B0B0 (M 0 )

A A0A0 B B0B0 C C0C0 D D0D0 M M0M0 N P P0P0 X0X0 X K Y0Y0 Y L R S T 1. (A 0 P 0 ) (D 0 M 0 ) =X 0. 2.[NM]. 3.(X 0 X) (AA 0 ). 4.[NK]. 5.(D 0 B 0 ) (A 0 P 0 ) = Y (YY 0 ) (AA 0 ). 7.Y = (YY 0 ) (KP). 8.(NY) (BB 0 ) =L. 9.[KL] [A 0 B 0 ] = R. 10.[KR]. 11.[NL] [D 0 B 0 ] = S. 12.(RS) [D 0 B 0 ]= T. 13.[NT]. 14.NKRT – сечение. (N 0 )

.. X..... X0X0. A A0A0 B B0B0 C C0C0 Y0Y0 Y S 1.(A 0 X 0 ) (B 0 C 0 ) = Y 0 2.(ВС) 3. (BC) (SY 0 ) = Y 4. (AY) (SX 0 ) = X.

S A B C M (M 0 ) N N0N0 P P0P0 E0E0 E H K 1.(P 0 N 0 ) (CB) = E 0 2. (PN) (SE 0 ) = E 3. (ME) (CB) = H 4. (MP) (AB) = K 5. HMK - СЕЧЕНИЕ

S A B CD M M0M0 N N0N0 P P0P0 X0X0 XK L H Y0Y0 Y F 1.(AM 0 ) (P 0 N 0 ) = X 0 2.(SX 0 ) (PN) = X 3.(MX) (SA) = K 4.(KN) (SB) = L 5.(KP) (SD) = H 6.(N 0 C) (AM 0 ) = Y 0 7.(KM) (SY 0 ) = Y 8.(NY) (SC) = F 9.FHKL = СЕЧЕНИЕ