Question

Biết AB//HD//EG . góc A = 40độ , góc E =50độ

a) Tính góc ACH ?

b) TÍnh góc ACE ?

 

Answer 1

a) Do AB//HD \(\Rightarrow\widehat{BAC}=\widehat{ACH}\) (2 góc so le trong)

\(\Rightarrow\widehat{ACH}=40^o\)

b) Do HD//EG \(\Rightarrow\widehat{HCE}=\widehat{CEG}\) (2 góc so le trong)

\(\widehat{HCE}=50^o\)

Mà: \(\widehat{ACE}=\widehat{ACH}+\widehat{HCE}\)

\(\Rightarrow\widehat{ACE}=40^o+50^o=90^o\)