cho tam giác ABC vuông tại A;vẽ AH vuông BC
a) cmr: góc B=góc CAH
b) AD là đường p/g của tam giác ABH.CM:góc CDA=góc B +góc BAD và góc CDA=gócCAD
giải giúp mik tối mik hok r
Hoàng NguyễnPundit
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
a) Xét $\Delta BAH$ có: $\widehat{BHA}=90^{0}$
$\Rightarrow \widehat{HBA}+\widehat{HAB}=90^{0}$
mà $\widehat{BAH}+\widehat{CAH}=90^{0}$ (hai góc phụ nhau)
$\Rightarrow \widehat{HBA}=\widehat{CAH}$
b) sai đề bài bạn nhé