.


:




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Must rjol toucfi






itt

must nut touch


V.


f triangle )

j f rectangle }**^


must not touch

. 18.5. ; Bi+i ,

416 II. Prolog


;:: 2 (. . 18.5). , , must_not_touch ( ), , . , , :.

, . 18.4, , . 18.5. : support, , . .

1. , .

2. , .

3. - , .

. , , , 3. , , support, support : must support , (. . 18.5). "-", , :

-

., ,

R ( must_R).

, , mustsupport. , - mustsupport . , "-", . , , .

, . . , ^ 3, : v, , 3 . isa - rectangle_or_triangle ( ). ( ) . , , . 18.6, . , , stable poly ( ), , - (. . 18.5).

, ( , ). , . , .


18.



, . 18.7, , , , , , EU-

/

'";. "


,: !


Circle


triangle rectangle trapezium u ns table _ triangle hexagon . 18.6.


hasp art

. >

support JL support


~~\

.; ' J

^*"(melanin }^*^

. 18.7. , . ,, . 18.S, , , , 18.6

, .

. . , , .

, , , .



II. Prolog


: , , , .

"-". "" , , .

[12] Prolog , , . , ARCHES. , . ( 18.4) ( 18.5). , .





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