Начертательная геометрия
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131 |
' : 1 - (" ); 2 – ; 3 – ; 4 –; 5 – ; 6 – ( - " ).
# " * $ * (" &)
( D . # " D D -.
@ . 8.5 " .
' D -, -, – ( . 8.6).
= . 8.5 |
= . 8.6 |
@ . 8.7 " "( ) . @-, /.
= . 8.7
* - D , , .
132 |
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(, (, ! |
& – ' D D. C + -' + ( . 8.8).
= . 8.8
3 – , ". ( -" -. @ , '( . 8.9). C, ' D, (( , , . 8.10).
= . 8.9 |
= . 8.10 |
' – ) " , D' ( . 8.11).
8. |
133 |
@ , - ' .
C ' D -, ( . 8.12).
= . 8.11 |
= . 8.12 |
& ( , , )+ , - . ; – .
+ 1 5. + -" -D' " " . I ( ( . 8.13)D , , ( . 8.14) –" . C +D : s, D' D ' - " ( . 8.15), l, D' D - " ( . 8.16). B ' D - . <- , -.
@ ) « ) » , : (25 ( . 8.17). C ).
= . 8.13 = . 8.14 |
= . 8.15 |
= . 8.16 |
= . 8.17 |
134 .
8.2. %)(
= D , .D , -
+ " , " .
/ , , , , -" (, ) ), - D' " . @ -( ) D " ) .
) D , -" " " -( . 8.8).
/ D- -+ ) , D. ( D -D . , – (( " ) D ,D .
& " -D' , -( . 8.18, ).
/ -, " ) . ! " , - D' " , D' -( , . 8.18, , ).
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= . 8.18
8. |
135 |
C , , , , " " - . # ( -" ) « » ( . 8.18, ).
D " «-
».
@ , ', D D .
@ . 8.19 , D' -" ( . 8.19, ) , D' « » ( . 8.19, ) « » ( . 8.19, ). = + ) , , + -, , .
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= . 8.19 |
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* " , " " , - . ; "-
, -
+ ( .
8.20), " ( {, .
8.20). ;
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+ , + -
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( " " + .
= . 8.20
136 .
8.3. = =(
= " .
' " D :
– ' " -( , –, . 8.21);
– ' "-( , , . 8.22);
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= . 8.21 |
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= . 8.22 |
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– ' "D " , " , –. 8.23.
= . 8.23
& , ') , -
8. |
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137 |
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( . 8.22). |
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( . 8.21, 8.22); |
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– D' . |
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( . 8.22). |
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= . 8.24 |
' (1 1,5)s. |
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2 – 3 + ( . 8.26). |
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= . 8.25 |
= . 8.26 |
138 |
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@ + - D' " .
+ 1 1 %.
, . 8.27, , - D' " , .
! ,' , D " ) , ' .
= D « – » ( ").
= . 8.27
4 % , % -, -% - . (, , . 8.22).
% , ) ) , - , " D D' .
( ' ) ) ), -D " D - , . C "D ( & – &, . 8.23). * -, D' " - " " ." ) (– , . 8.23).
8. |
139 |
' D ' ( . 8.28 – 8.30). @-( " .
/ ' -, 'D' " . ' (-, , D , - D D' D ( . 8.28, {).
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= . 8.28 |
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= . 8.29 |
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= . 8.30 |
/ ' D ,( . 8.21, 8.22).
= , ' + -, " , .
; ++ ( . 8.31 – 8.34). B- " .
= . 8.31 = . 8.32
= . 8.33 |
= . 8.34 |
140 |
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D' " - |
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, + + |
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. / ( D - |
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, ) " , |
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D' |
( . 8.34). C |
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+ , - |
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D' " , + |
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" , ' |
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( . 8.35). |
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C |
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; |
, |
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" " " . . |
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, ( - |
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( . 8.36). |
- |
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, |
D' " |
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" D - |
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= . 8.35 |
, D' - |
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. |
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/ D - , |
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, , D + - |
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( . 8.37). < D ( - |
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, . 8.37, ) ( - |
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, . 8.37, ) . |
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= . 8.36 |
= . 8.37 |
8.4. - %*
, ' , D ( . 8.11, 8.38) ( . 8.39).
< + . * - " " " ( . 8.40).