Cho tam giác ABC vuông tại A, biết , BC = 10 cm . 

a)Giải tam giác vuông ABC ?

b)Vẽ đường cao AH, đường trung tuyến AM . Tính độ dài AH, HM?

 với 

giúp em với ạ

1- There is no water left in the ____________well. (near)
2- He is now studying in the USA as an ____________ student.( change)
3- He was a good __________________ of coins. (collect)
4-Japan is said to be a_______________ country.(mountain)
5- Finding the film is ____________ we turned the TV off. (interest)
6- The _________________ of trees occurs very slowly. (Grow)
7- Most students go __________________ when they have one Saturday off. (picnic )
8- Some pack trips to Thailand are _____________ cheap.(surprise)
9- We were _______________ at what they are talking about. .(surprise
10- Where’s Bermuda? Can you tell me its ___________________? (locate)
11- The show brought ________________ to millions of viewers.(enjoy)
12- Most of the ________________have lived here all their lives.(village)
13- She listens to music for _________________ (relax)
14- I find this piece of music very __________ (rest)
15- He made a _______________ of Roman coins and medals.(collect)
16- We had an _______________ student from Spain staying with us last year.( change)
17- We spent an ______________ evening talking about old times.(enjoy)
18- To our_______________ ,he swallowed a sword.(amaze)
19- I was ____________________at the depth of her knowledge.(amaze)
20- We stayed at a hotel with a ____________________ atmosphere. (rest)
21- They _______________ gather their things and ran to the bus stop. (hurry)
22- Thousands are going_____________ because of the failure of this year’s harvest. (hunger )
23- The poor children gazed_________________ at the display of food (hungry )
24- A______________________ number of people are returning to full-time education. (grow)1- There is no water left in the ____________well. (near)
2- He is now studying in the USA as an ____________ student.( change)
3- He was a good __________________ of coins. (collect)
4-Japan is said to be a_______________ country.(mountain)
5- Finding the film is ____________ we turned the TV off. (interest)
6- The _________________ of trees occurs very slowly. (Grow)
7- Most students go __________________ when they have one Saturday off. (picnic )
8- Some pack trips to Thailand are _____________ cheap.(surprise)
9- We were _______________ at what they are talking about. .(surprise
10- Where’s Bermuda? Can you tell me its ___________________? (locate)
11- The show brought ________________ to millions of viewers.(enjoy)
12- Most of the ________________have lived here all their lives.(village)
13- She listens to music for _________________ (relax)
14- I find this piece of music very __________ (rest)
15- He made a _______________ of Roman coins and medals.(collect)
16- We had an _______________ student from Spain staying with us last year.( change)
17- We spent an ______________ evening talking about old times.(enjoy)
18- To our_______________ ,he swallowed a sword.(amaze)
19- I was ____________________at the depth of her knowledge.(amaze)
20- We stayed at a hotel with a ____________________ atmosphere. (rest)
21- They _______________ gather their things and ran to the bus stop. (hurry)
22- Thousands are going_____________ because of the failure of this year’s harvest. (hunger )
23- The poor children gazed_________________ at the display of food (hungry )
24- A______________________ number of people are returning to full-time education. (grow)

1- At the ___________________ to the village, we saw the accident. (enter)
2- They had an ___________________ day by the river. (enjoy)
3- It is an ___________________ program. (interest)
4- The song is ________________ to me. (interest)
5- We felt ________________ in the show. (interest)
6- I have a great _____________ for his work.(admire)
7- Do not ____________ without knocking(entrance)
8- I’m _______________ in buying new books. (interest)
9- Her daughter has a wonderful _________________ of coins and stamps.(collect)
10- Be ________________ when you cross the street.(care)
11- The aim of our course was to ____________ students with the use of the Internet.(familiar)
12- Her _______________ with the language helped her enjoy her stay. .(familiar)
13- Baseball is _____________ sport in the USA.(nation)
14- He touched her cheek _______________( familiarity)
15- He also noticed that the stars one can see vary as one moves northward or __________ (south.)
16- What do you want to be when you are _______________? (grow)
17- Getting to the village is a very __________________ journey. (interest)
18- Visitors can catch sight of an old banyan tree at the ___________ of the village.(enter)
19- Dalat is a _________ city.(hill)
20- We really had an _______________ day on the beach.(enjoy)
21- Their holiday was spent _______________ on the mountain. .(enjoy)
22- Since her ______________ , the room has been full of laughter.(arrive)
23- Most modern buildings have underground _____________ lots .(park)
24- I went to the _____________store to buy something .(grocer)

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2. CaCO3+....->.....+H2O+CO2

3.MgCl2+...->BaSO4+ZnCl2

4 BaCl2+....->BaSO4+ZnCl2

5 2KMn04->

giúp em với ạ, em còn mỗi câu này là làm xong bài rồi ạ

Cho tam giác ABC vuông tại A, đường cao AH. Biết
HB = 9 cm; HC = 16 cm. Tính diện tích tam tích tam giác ABC và số đo góc HAB

Vận tốc rơi tự do của một vật được tính bởi công thức: trong đó, v là vận tốc tính theo m/s, h là độ cao của vật lúc bắt đầu rơi tính bằng mét (m) và g = 9,8 m/s2 .

Một vận động viên nhảy dù khi trình diễn việc rơi tự do đạt vận tốc 140 m/s. Hỏi độ cao của vận động viên đó lúc bắt đầu thực hiện động tác nhảy là bao nhiêu m ?

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