topic 1:Write a paragraph (60-80 words) about the advantages of living a healthy lifestyle.

Living a healthy lifestyle brings many good benefits to our life. When we eat healthy food, drink enough water, and exercise regularly, our body becomes stronger and healthier. We will feel less tired and have more energy every day. Healthy habits also help us avoid many diseases and stay fit. Besides, living healthily helps us sleep better, feel happier, study more effectively at school, and enjoy life more with our family and friends.

topic 2:Write a paragraph (60-80 words) about your family traditions or customs at New Year.

My family has many meaningful traditions at New Year. Before the holiday, everyone helps clean and decorate the house to welcome good luck. On New Year’s Eve, we cook traditional food and enjoy a warm family meal together. We stay up late to watch fireworks and welcome the New Year. On the first days of the year, we visit relatives, give lucky money, and share good wishes for health and happiness.

topic 3:Write a paragraph (60-80 words) about the things you do to help your family.

As a member of my family, I also do the housework to help my parents. Because I spend a lot of time studying at school and extra classes, I only do the housework after finishing studying or having dinner. I do many different household chores such as cleaning the floor, making the beds and feeding the pets. Sometimes, I help my mom cook or wash the dishes when she is busy with my little brother.

1.Muong earn their living by farming and raising animals.

2.They are in the habit of exercising after work

1.If you don't drink more water,you will get acne

2.My sister wants to go to Sa Pa because she wants to see the terraced field

3.Unless he spends time on his phone,he will complete his work

Xét tứ giác AHCD có :

I là trung điểm AC (gt)

I là trung điểm HD (gt)

=> AHCD là hình bình hành (t/c)

Mà ˆAHCD= 90 độ ( AH ⊥ BC )

Suy ra AHCD là hình chữ nhật

a)Vì Ax ⊥ AC ⇒ AM ⊥ AC

mà BM // AC

⇒ AM ⊥ BM

Chứng minh tương tự ⇒ AQ // BM và BM // AQ (cmt)

Suy ra AMBQ là hình bình hành.

Mà ˆAMB=ˆMBQ=ˆABQ=ˆMAQ=90 độ

Vậy AMBQ là hình chữ nhật.

b)AMBQ là hình chữ nhật mà Đường thẳng AB và đường thẳng QM cắt nhau tại điểm P.

⇒ P là trung điểm AB và P là trung điểm QM

ΔABI vuông tại I có đường trung tuyến IP

⇒ IP=1/2AB

⇒ IP = PQ

⇒ ΔIPQ cân tại P.

Xét ΔABC có đường trung tuyến BM và BM=1/2AC

⇒ΔABC vuông tại B:góc B=90 độ

Xét tứ giác ABCD có ˆA=ˆD=ˆB=90 độ
⇒Tứ giác ABCD là hình chữ nhật