16 xe chở số học sinh là :

16 x 50 = 800 ( học sinh )

Nếu thuê xe 40 chỗ ngồi thì thuê số ô tô là :

800 : 40 = 20 ( xe )

đ/s 20 xe

cre baji

because of her healthy kids , they joined the healthy contest

cre baji

Hello, my name is yen. I'm thirteen years old. I live with my family in Phuoc loc Village.I was born in Tuy Phuoc District . My family has four members  such as my parents, my sister and me. I study at Phuoc Loc Two Primary School and it's also my second home. Everyone at school is very friendly and helpful. My hometown is in Phu Cat District and my home town is very peaceful, everyone is hospitable .My favourite subject are English and Music and I am good at them.My favourite sport is badminton. I always play badminton at the weekend. In my free time, I often listen to music and watch TV. I am very interested in studying EnglishI singing and drawing ,too. Everone thinks I am a hard-working student And I also proud of it. 

a) Xét tam giác ABD vuông tại A và tam giác EBD vuông tại E

có: góc ABD = góc EBD (gt)

BD là cạnh chung

b) Xét tam giác ABC vuông tại A

có:  ( py - ta - go)

thay số: 

ta có: 

=> AB = EB = 6cm ( 2 cạnh tương ứng)

=> EB = 6cm

mà EB + EC = BC ( E thuộc BC )

thay sô: 6 cm + EC = 10 cm

                         EC = 10 cm - 6 cm

                        EC = 4 cm

c) ta có: 

=> AD = ED ( 2 cạnh tương ứng)

Xét tam giác ADI vuông tại A và tam giác EDC vuông tại E

có: góc ADI = góc EDC ( đối đỉnh)

  AD = ED ( cmt)

=> AI = EC ( 2 cạnh tương ứng)

Mà AB = BE ( tam giác ABD = tam giác EBD)

=> AI + AB = EC + BE

=> IB = CB

=> tam giác BIC cân tại B ( định lí tam giác cân)

d) ta có: AD = ED ( tam giác ABD = tam giác EBD) (a)

Xét tam giác EDC vuông tại E

có: ED < DC ( định lí cạnh huyền, góc nhọn) (b)

Từ (a); (b) => AD < DC.

cre baji

3. The festival / feature / many folk games / bamboo swings / rice cooking competitions / lion dance / human chess / water puppet performance / wrestling / crossbow shooting, etc.

The festival features many folk games like bamboo swings, rice cooking competitions ,lion dance, human chess , water puppet performance , wrestling , crossbow shooting, etc.

4. the 10th day / a national ceremony / held / participation / about 40 vallages.

the 10th day has a national ceremony which is held with the participation of about 40 villages.

5. Governmental leaders / will lead / procession / up / Upper Temple.

Governmental leaders will lead procession up Upper Temple.

6. There / a ceremony / offering incense / five - fruits trays / and specialities / chung cakes / day cakes / which / two traditional foods / Vietnamese.

There is a ceremony of offering incense and five - fruits trays , and specialities like chung cakes , day cakes which are two traditional foods of Vietnamese.

Ex 2  : Make sentenes about King Hung Temple Festival, using the words and phrases given. You can add some words and make changes:

1. King Hung Temple Festival/ take place/ yearly/ King Hung Temple/ the 8th/ 11th day/ the third lunar month .

=>King Hung Temple Festival takes place yearly at King Hung Temple from the 8th to 11th day of the third lunar month

2. During the festival/ Vietnamese people/ go/ King Hung Temple/ Nghia Linh Mountain, Phu Tho Province/ take part/ this festival.

=>During the festival Vietnamese people go King Hung Temple on Nghia Linh Mountain, Phu Tho Province to take part in this festival.

cre baji

Ex 2  : Make sentenes about King Hung Temple Festival, using the words and phrases given. You can add some words and make changes:

1. King Hung Temple Festival/ take place/ yearly/ King Hung Temple/ the 8th/ 11th day/ the third lunar month .

=>King Hung Temple Festival takes place yearly at King Hung Temple from the 8th to 11th day of the third lunar month

2. During the festival/ Vietnamese people/ go/ King Hung Temple/ Nghia Linh Mountain, Phu Tho Province/ take part/ this festival.

=>During the festival Vietnamese people go King Hung Temple on Nghia Linh Mountain, Phu Tho Province to take part in this festival.

cre baji

1. Mel enjoys reading books .

2. David doesn't like playing tennis .

3. Sophia really likes sitting on the sofa .

4. Harry doesn't mind  doing housework .

5. Rob and Steve love drinking fizzy drinks .

cre baji

hình nè

a.Xét tam giác  và tam giác  có:
           ( gt )
Góc  = Góc  ( đối đỉnh )
          ( gt )
⇒Tam giác  = Tam giác 

b.Ta có Tam giác  = tam giác 

nên khoảng cách trung tuyến của  và  đều bằng nhau.

⇒  là trung điểm của đoạn