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/ .

.
1/ .
2/C/











.
3/
xq
S
.
3:  .
4: 







 .ABCD.
1/=

.
T.
5:





 .ABC.
1/=

=l ,.
2/=













,.
2
6:  2a, 















 .
1/
xq tp
S va S
.
2/ .
3/ .
8: 






















0
30
.
1/
xq tp
S va S
.
2/ .
9: 



 
.
1/
xq tp
S va S
.








 ,y





0
60
.
1/ .
3
2/
3/ .
12: 







 =










 ?
13: .





, 


.
1/ 







 .
2/ 
tan


















.
1/ .
2/
xq
S
 .
3/ 












 .
(ABC)  .Cho

0
BAA' 45
.
1/C/







 .
2/
xq
S
 .
17: 






3/  .


5 

S,A,B,C,D.
18:   t

.









 ,




















 .






.










AD SB, AE SC
.=a,
BC=b,SA=c.
1/.ADE.







 .

AB =a,BC =2a ,=a.




 AM =3MD.
1/ 
2/ 
23: 







 =a,BC =b ,=c.,N











0
60
..
25: 



.(H) 














.
ABCD
V(H)




.C/m :
S.A'B'C'
S.ABC
V
SA' SB' SC'
. . .
V SA SB SC


6
30: 





 .

=a .,SB,










.











 ,








=a ,AD=b, SA =c.



,




60
. .








,





.

 S.AEMF.
34: 







 .







 .
1/.
2/



(DMN) 





 2 

.(H) 






,() .
(H)
(H')
V
V