${\mathrm{a,A}OD}^{}$; $\widehat{DOB}$; $\widehat{COB}$

$b)$ $\widehat{BOC}$=$180$-$\widehat{COA}$=$180-50=130$

$\Rightarrow$ $\widehat{BOD=50}$ ( đối đỉnh với $\widehat{AOC}$ )

Ế sao lại thế nhỉ!? Hình như máy mình bị lỗi.
☹SORRY☹

$a)$ $\widehat{AOC}$; $\widehat{AOD}$; $\widehat{DOB}$; $\widehat{COB}$

$b)$ $\widehat{BOC}$=$180$-$\widehat{COA}$=$180-50=130$

$\Rightarrow$ $\widehat{BOD=50}$ ( đối đỉnh với $\widehat{AOC}$ )

Part IV: Writing
I. Rewrite the sentences without changing the meaning.
1. You are patient . You will remember the answer.
-> If you were patient, you would remember the answer.
2. They are good football players.
-> They play football well.
3. Nam is interested in using “green” shopping bag.
-> Nam likes  using “green” shopping bag.
4. We will save a lot of trees. We use less paper.
-> If we use less paper, we will save a lot of trees.
II. Rearrange the words to make meaningful sentences
1. be/ My future house/ space./ in/ will
My future house will be in  space.

2. because/ I/ UFO/ like/ is/ modern./ it
I like UFO because it is modern.
3. If / you / work hard, you / pass / will/the exam.
if you work hard, you will pass the exam.

4. There/ be/ less/ air pollution/ if/ more people/ cycle/will.
If more people cycle, there will be less air pollution.
Học tốt nha!❤❤

Chiếc thuyền ngoài xa

2 + 2 =4

3 + 3 =6
4 + 4 =8