100_bai_toan_on_hinh_hoc_khong_gain_theo_chu_de(theo chuong trinh mo)

1 100 BI TON ÔN LUYN ĐI HC (THEO CHƯƠNG TRI ̀ NH MƠ ́ I) CH Đ HNH HC KHÔNG GIAN **************** 1: Cho     .      , AC = b ,  0 C 60 . ()      0 30 . 1/ 2/ . 2:     c ABC.                       ,B,C. 0 60 . 1/ . 2/C/            . 3/ xq S  . 3:  . 4:          .ABCD. 1/=              ,. 2/                . T. 5:       .ABC. 1/=  =l ,. 2/=              ,. 2 6:  2a,       ,         0 30 . . 7:                              . 1/ xq tp S va S . 2/ . 3/ . 8:                    R3 .    2   2                          0 30 . 1/ xq tp S va S . 2/ . 9:       . 1/ xq tp S va S . 2/   . 10:              a . 1/ . 2/. 3/ . 11:                    ,y      0 60 . 1/ . 3 2/ 3/ . 12:          =        y R.    ,   = x (0<x<h). 1/ ()          . 2/  () theo R ,  .            ? 13:  .      ,   . 1/          . 2/  tan  . 14:            =            .                         . 1/ . 2/ xq S  . 3/        tp S . 15:      .    ,   ()   . xq S   . 4 16:    .           . (ABC)  .Cho  0 BAA' 45 . 1/C/         . 2/ xq S  . 17:           .            ASB . 1/ xq S . 2/C/m r : 2 a cot 1 22   3/  .   5   S,A,B,C,D. 18:   t  .           ,            0 60 .. 19:   .         cân ,AB=AC=5a ,BC =6a ,      0 60 .. 20:        .           .       .           AD SB, AE SC .=a, BC=b,SA=c. 1/.ADE. 2/ (SAB) . 5 21:              1        1      1   . 22:          .  AB =a,BC =2a ,=a.      AM =3MD. 1/ 2/  23:          =a,BC =b ,=c.,N              . .DMN   24: Cho 2          ,      .=h, AB =a, CD =      2        0 60 .. 25:     .(H)                . ABCD V(H) V . 26:  . 27:  . 28:      .      29:     .ABC.      ,SB,  3   , ,     .C/m : S.A'B'C' S.ABC V SA' SB' SC' . . . V SA SB SC  6 30:        .  =a .,SB,            0 60 .. 31:        .ABC =5a ,BC=6a ,CA=7a. SAB,SBC,           0 60 . . 32:     .             ,         =a ,AD=b, SA =c.    ,      ,SD sao cho AB' SB,AD' SD .    ()   .. B33:          .ABCD ,         ,  0 60 . .         ,      .   S.AEMF. 34:          .        . 1/  . 2/         ABC ,      F. 35:      ... ,       . 1/ . 2/    (DMN)        2   .(H)        ,()  . (H) (H') V V 7 36:   .    =a ,         AB =BC =a. ,           ABC . 1/ .ABC. 2/C/m : SC mp( AB'C') . 3/ 37:   .    = 2a , ABC     =2a,  0 CAB 30 .,           . 1/ .ABC. 2/C/m : AH SB  SB mp(AHK) . 3/   .AHK. 38:        .               =a ,BC =2a ,=3a .  (P)          . 1/    2/C/m : AN A'B . 3/ . 4/ AMN S  . 39:   .        2a ,         , AB =a, AC a 3  (ABC)  . .       2       8  40: C    .         2a ,SA=a , SB a 3 (SAB)            .,       ,BC . .   2     ,DN. i 41:     .         ,AB=BC=a,  AA' a 2 . . .         2       42:    .           ,                    .,N,             ,BC,CD.C/m : AM BP .  43:         .           .            ,        ,       . C/m : MN BD  2       .  44:    .         ,   0 ABC BAD 90 , BA=BC=a ,AD =2a. SA a 2 .      . C/m SCD vuông    d H;(SCD) .  45:            2  ,    .         ,          = 2a .. 9  46:    .               =a , AD a 2 ,SA=    SA mp(ABCD) . M,           SC .        . 1/Cmr: mp(SAC) mp(SMB) 2/ .  47:       .           , SA =2a  SA mp(ABC) .,                   .A.BCMN.  48:          .  ,      qua 2           1  0 60 ..  49: 1  ;                  1   .. i 50: Cho 1  .      =              1    1   . .  51: 1  1   .  .  52:     .ABC c , = a .            .             . 1/C/           . 2/. 10  53:          .      1  .   . xq S .  54:        .ABC .            ,             1   .           0 A 90 ,  0 B 60 , =a.  xq S .  55:            .  1     =AC =    A2 .  3   ,B,      ( ABC)   .  xq S     .  56:      .        1    .        ,A,        (ABC) 1     1   ..  57:          .               ông   , .  ASB = 2    00 0 45   .  xq S .  58:     ..        =AC = 0 120 .  .  xq S  .  59:      .A             . 1 100 BI TON ÔN LUYN ĐI HC (THEO CHƯƠNG TRI ̀ NH MƠ ́ I) CH Đ HNH HC KHÔNG GIAN **************** 1:. 1/ ()          . 2/  () theo R ,  .            ? 13: . ,  . .                .  74: Trong mp(P) cho 1     1            =h .    ,C