Question

Answer 1

`a, hatx = 180^o - 80^o = 100^o`

`haty = 180^o - 40^o = 140^o`

`b, haty = 180^o - (180^o -50^o) = 50^o`

`hatx = 180^o - (180^o - 70^o) = 70^o`

`c, hatx = 180^o - 90^o = 90^o`

`haty = 180^o - 65^o = 115^o`

Answer 2

Hình a)

Do \(\widehat{A}\) và \(\widehat{D}\) là hai góc trong cùng phía

\(\Rightarrow\widehat{A}+\widehat{D}=180^0\)

\(\Rightarrow x=\widehat{A}=180^0-\widehat{D}=180^0-80^0=100^0\)

Do \(\widehat{B}\) và \(\widehat{C}\) là hai góc trong cùng phía

\(\Rightarrow\widehat{B}+\widehat{C}=180^0\)

\(\Rightarrow y=\widehat{C}=180^0-\widehat{B}=180^0-40^0=140^0\)