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TG
3
11 tháng 11 2018
+ ΔAHB và ΔCKD có
HB = KD (=1)
góc AHB = góc CKD(=90º)
AH = CK (=3).
⇒ ΔAHB = ΔCKD(c.g.c)
⇒AB = CD (hai cạnh tương ứng)
+ ΔCEB và ΔAFD có
BE = DF (=2)
góc BEC = góc DFA (=90º)
CE = AF (=4).
⇒ ΔCEB = ΔAFD ( c.g.c)
⇒ BC = AD (hai cạnh tương ứng)
b) ΔABD và ΔCDB có
AB = CD
AD = BC
BD cạnh chung
⇒ ΔABD = ΔCDB (c.c.c)
⇒ góc ABD = góc CDB (hai góc tương ứng)
Vậy AB // CD ( hai gó so le trong bằng nhau )
k minh nha
11 tháng 11 2018
(hình hơi xấu, thông cảm nha)
a) Xét \(\Delta AEB\)và \(\Delta DFC\) có:
AE = DF
\(\widehat{AEB}=\widehat{DFC}=90^o\)
BE = CF
Do đó: \(\Delta AEB=\Delta DFC\) (c.g.c)
Suy ra: AB = DC (đpcm)
Xét \(\Delta BMC\) và \(\Delta DNA\) có:
MC = NA
\(\widehat{BMC}=\widehat{DNA}=90^o\)
BM = DN
Do đó: \(\Delta BMC=\Delta DNA\)
Suy ra: BC = AD (đpcm)
b) Xét \(\Delta ABD\) và \(\Delta CDB\) có:
AB = CD (câu a)
BC = AD (câu a)
BD là cạnh chung
Do đó: \(\Delta ABD=\Delta CDB\) (c.c.c)
Suy ra: \(\widehat{ABD}=\widehat{CDB}\) (so le trong)
=> AB // CD (đpcm)
19 tháng 5 2018
“Stuffed sky rice cake” is one the most traditional special foods for the lunar new year in Viet Nam. It is made of sky rice, pork and green bean, all ingredients are wrapped inside a special leaf which calls Lá Dong. The rice and green bean have to be soaked in water for a day. The pork is usually seasoned with pepper & salt for several hours. Banh Chung is boiled for 6 or 8 hours. Nowadays, families in villages still maintain making stuffed sky rice cake before the lunar New Year but people in the cities do not. They don’t have time to make it and usually go to shops to buy it.”
(Bánh Chưng là một trong những món ăn truyền thống đặc biết nhất trong dịp tết cổ truyền Việt Nam. Nó được làm từ gạp nếp, thịt lợn và đỗ xanh, tất cả nguyên liệu gói trong một loại lá đặc biệt tên là Lá Dong. Gạo và đỗ xanh phải được ngâm nước khoảng 1 ngày. Thịt lợn thường được ướp với tiêu và muối hàng giờ. Bánh Chưng thường được luộc trong vòng 6 – 8 tiếng. Ngày nay, các gia đình ở vùng nông thôn vẫn giữu truyền thống gói bánh chưng trước tết âm lịch nhưng các gia đình ở thành thị thì không. Họ không có thời gian tự làm và thường đến cửa hàng để mua.)
CHÚC BẠN HỌC TỐT NHA>.<
7 tháng 4 2020
1.She would to buy some postcards
2.How long does it take to get to Hanoi by plane
3.Minh lives with his brother in an apartment in town
Câu 3 có ghi sai đề k bạn???
8 tháng 4 2020
Tl:
1, She would to buy some postcards
2, How long does it take to get there by plane?
3, Minh lives with his brother in an apartment in town * hình như sai đề*
~Hok tốt~
___Yu__
13 tháng 12 2020
➙My baby drinks more milk than her baby.
➙My baby doesn't drinks less milk than her baby.
mí bạn xem mk lm đúng ko nha.
PD
13 tháng 12 2020
REWRITE THE FOLLOWING SENTENCES:
1. Her baby drinks less milk than my baby.
→ My baby drinks more milk than her baby.
➝ My baby doesn't drink as little milk as her baby does.
HT
1 tháng 10 2018
Nowadays, the health is important because if we have a good health, we can make any things in our life. However, it isn't really easy to have a good health. For me, I have some ideas to keep a good health.
Firstly, if we usually do exercise, we will be strongly. Doing exercise is good because it helps our body to relax. So, we are comfortable to go to school or go to work. Besides, it also helps us avoid illness. For exam, when we do exercise in the morning, we can breathe fresh air.
Secondly, we eat many vegetables which help us to live in lifelong. Green vegetable contain many types of vitamins such as vitamin A, vitamin B so on. Besides, it also supports a lot of fibers which reduces cholesterol in blood.
In conclusion, there are many of methods to keep a good health. For me, doing exercise and eating a lot of vegetables are the most important because they bring many benefits for health. I think we have to make it everyday to have a good health.
QN
1
PM
4
AR
2
TH
23 tháng 10 2021
1.started smoking cigarettes a month ago
2. to walk at twenty minutes to school every morning
3.I haven't seen my uncle for two years
4.going to the movies tonight?
5.so stayed at home from school yesterday
6.me three hours to make...
7.gardening at the weekend
8.để nguyên vế sau
10.watching...
11.Minh ....
12.seen her since 2001
PN
23 tháng 10 2021
1. The last time he smoked was a month ago
2. it takes me twenty minutes to walk to school every morning.
3. I haven't seen my uncle for two years
4. Let's go to the movies tonight.
5. July had a high fever, so she stayed home from school yesterday.
6. I spent three hours making this pottery jug
7. My father enjoys gardening at the weekend
8. What about going swimming this afternoon?
9. My father is interested in playing board games.
10. He enjoys watching football very much.
11. Because Minh was sick, she could not go to school.
12. We haven't seen her since 2001
9 tháng 9 2016
I. Choose the best answer. (5 points) 1.- I am a new student.
- _____________.A. So am I.B. So I am.C. So do I.D. I am so.2.There is ___________ water in the bottle.A. a lots ofB. manyC. a lot ofD. a lot3.Which is the family name in "Nguyen Thanh Phong"?A. NguyenB. ThanhC. PhongD. Nguyen Thanh4.My new house is ____________ my old house.A. nice thanB. nicer thanC. nicerD. more nicer than5.__________ is it from your house to school?A. WhoB. WhatC. How farD. WhereII. Read the text and answer the questions below. (5 points)Hoa is a new student in class 7 A . She is from Hue . Her parents still live there. They are farmers and they work hard from morning till night. They grow rice, corn, vegetables and they raise cattle and animals. Hoa doesn’t live in Hue with her parents. She lives with her Uncle and Aunt in Ha Noi. Every day she walks to school because her house is not far from her school about one km. Her new school is bigger than her old school. Her new school has many students. She is very unhappy because she doesn't have any friends in Ha Noi and she misses her parents and her friends in Hue.1.Is Hoa in grade 6? 2.Where do Hoa’s parents live? 3.Is her mother a farmer ? 4.How far is it from Hoa’s house to her school? 5.What do they grow on the farm?
- _____________.A. So am I.B. So I am.C. So do I.D. I am so.2.There is ___________ water in the bottle.A. a lots ofB. manyC. a lot ofD. a lot3.Which is the family name in "Nguyen Thanh Phong"?A. NguyenB. ThanhC. PhongD. Nguyen Thanh4.My new house is ____________ my old house.A. nice thanB. nicer thanC. nicerD. more nicer than5.__________ is it from your house to school?A. WhoB. WhatC. How farD. WhereII. Read the text and answer the questions below. (5 points)Hoa is a new student in class 7 A . She is from Hue . Her parents still live there. They are farmers and they work hard from morning till night. They grow rice, corn, vegetables and they raise cattle and animals. Hoa doesn’t live in Hue with her parents. She lives with her Uncle and Aunt in Ha Noi. Every day she walks to school because her house is not far from her school about one km. Her new school is bigger than her old school. Her new school has many students. She is very unhappy because she doesn't have any friends in Ha Noi and she misses her parents and her friends in Hue.1.Is Hoa in grade 6? 2.Where do Hoa’s parents live? 3.Is her mother a farmer ? 4.How far is it from Hoa’s house to her school? 5.What do they grow on the farm?
9 tháng 9 2016
I. Choose the best answer. (3 points) 1.What is your _____________? It's 36 Minh Khai Street.A. telephone directoryB. home addressC. telephone number.D. birthday2._____________ you be free next Sunday?A. DoB. AreC. IsD. Will3.Monday is the ____________ day of the week.A. firstB. secondC. thirdD. fourth4.The month before September is ____________.A. JanuaryB. AugustC. DecemberD. OctoberII. Write words for the following numbers. (3 points) 1.4th 2.5th 3.17th 4.21st 5.29th III. Write questions for the underlined words. (4 points) 1.They will visit Hue next month. 2.I will stay in a hotel when I am in Ha Noi. 3.He will be fourteen in 2014. 4.December is the twelfth month of the year.
1) He didn't meet her last night and neither did I.
2) What did your mother write for you ?
3) I'm not a doctor and they aren't either.
4) ... between vegetables and the stall