Giúp e bài IX vs ah
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DT
Đỗ Thanh Hải
CTVVIP
14 tháng 7 2021
IV
1 do
2 to be
3 was waiting
4 went - wouldn't be
5 were
6 smoking
7 is always leaving
8 to study
9 haven't spoken
10 arrive
V
1 wealthy
2 imagination
3 literately
4 phýical
5 observation
6 Married
7 behavior
8 incredible
9 seniority
10 unbelievable
14 tháng 7 2021
IV
1 do
2 to be
3 was waiting
4 went - wouldn't be
5 were
6 smoking
7 is always leaving
8 to study
9 haven't spoken
10 arrive
V
1 wealthy
2 imagination
3 literately
4 physical
5 observation
6 Married
7 behavior
8 incredible
9 seniority
10 unbelievable
11 tháng 4 2023
b: Sửa đề: AO vuông góc BI
Gọi M là trung điểm của IC
Xét ΔIHC có IO/IH=IM/IC
nên OM//HC và OM=1/2HC
=>OM vuông góc AH
Xet ΔAHM có
MO,HI là đường cao
MO cắt HI tại O
=>O là trực tâm
=>AO vuông góc HM
=>AO vuông góc BI
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