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Arts, 04.08.2021 16:20 spearjj

Câu 3: Cho chóp S ABCD .
. Lấy hai điểm
I J,
lần lượt trên
AD SB , .
a) Tìm
K
là giao điểm
IJ

SAC. Tìm
L
là giao điểm
DJ

SAC.
b) Biết rằng
AD
cắt
BC
tại
O

OJ
cắt
SC
tại
M
. Chứng minh rằng
A K L M , , ,
thẳng hàng.

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Câu 3: Cho chóp S ABCD .
. Lấy hai điểm
I J,
lần lượt trên
AD SB , .
...
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