Cho ΔABC vuông tại A,BD là phân giác góc ABC,D ∈AC.Trên cạnh BC lấy điểm E sao cho BA=BE 1) Cm DE ⊥BC 2)Cm BD là đường trung trực của AE 3)Cho AB=3cm,BD=5cm.Tính DE 4)Trên tia đối của tia AB lấy điểm K sao cho AK=CE.Cm 3 điểm K,D,E thẳng hàng 5) ΔBKC là tam giác gì? ΔABC cần thêm điều kiện gì để ΔBKC đều 6)Gọi H là trung điểm của KC.Cm 3 điểm B,H,D thẳng hàng 7)Cm AE song song KC 8)Kẻ AH1 ⊥BC.Cm AE là phân giác của ∠CAH1 9) ΔABC cần thêm điều kiện gì để H1 là trung điểm của BC Ai giải giúp em câu 8,9 vs ạ,em hứa sẽ vote 5 sao ạ!
Dựa vào bảng ghi độ tăng chiều dài của các thanh kim loại (có chiều dài ban đầu là 100 cm) như sau: Chất Độ giãn nở dài khi nhiệt độ tăng thêm 50 o C Nhôm 0,12 cm Đồng 0,086 cm Sắt 0,06 cm Hỏi một thanh nhôm dài 10 m khi nhiệt độ của nó tăng từ 20 o C lên đến 50 o C thì chiều dài của nó là bao nhiêu giúp mik vs mik cần ngay bây giờ
I/ Use of English ( 2.5 pts) A. Choose the best answer 1/ My dad doesn’t mind __________my mom from work every day. A. pick up B. picked up C. picks up D. picking up 2/ Find the word which has a different sound in the part underlined. A. played B. decided C.gathered D. loved A. brushes B. buses C.boxes D. tables 3/ __________a horse is one of the skills every nomadic child in Mongolia has to learn. A. Riding B. Ride C. To rice D. Ridden 4/ The hills are __________in spring when the wild flowers bloom. A. beauty B. colourful C. peaceful D. safely 5/ Can you speak __________? My English is not good. A. slow B. fast C. more slowly D. faster 6/ On Sunday, we can get up __________than usual. A. late B. early C. earlier D. later 7/Nga enjoys __________on Sundays? A. gardening B. garden C. gardened D. gardens B. Give the correct form of the following verbs. (0,5pt) 1. They …………………… a nomadic life for six years. (live) 2. Children in this village love ………….. kites on summer afternoons. (fly) C. Write the correct form of the adverbs in bracket to complete the sentences (0,5pt) 1. On Sunday morning I often get up (late) ……………... than usual. 2. If you want to stay slim, you have to eat (healthily) …………………………... II/ Reading ( 2.5 pts) Part I: Read the text and complete the following sentences with NO MORE THAN THREE WORDS. ( 1.25 pts) Vietnamese countryside life is simple and traditional. People gather to form villages. Each village developed its own regulations. The purpose of these regulations is the promotion of good customs within populations. In each village, there is a communal cultural house where villagers often hold events to worship the village god or important celebrities. Vietnamese villagers survive by farming, raising cattle and making handicraft. They are well known for being kind, hard – working and patient. Villagers usually get up very early in the morning. After the children leave for school, the adults usually go to the rice paddies, feed the pigs, collect eggs and grow vegetables. Children often help their parents do housework chores after school. Vietnamese people highly respect the importance of family in their life. According to Vietnamese tradition, the old generations are highly admired by the young ones. Young people are thought to be obedient and have good behaviors toward old people. 1. Vietnamese countryside life is 2. Each village developed its own regulatoins to promote the within populations. 3. Villagers often hold important events in a 4. Vietnameas villagers often live by farming, raising cattle and 5. Villagers usually very early in the morning. Part II: Read the passage carefully. (1.25pts) MY VILLAGE I live in a village by Mekong River. Every day, like most of my friends, I walk to school. It is three kilometres away. After class, I often help my mother to collect water from the river and feed the chickens. At the weekend, the villagers often gather at the community hall where there is a TV. The adults watch TV, but more often they talk about their farm work and exchange news. The children run around, playing games and shouting merrily. Laughter is heard everywhere. My father sometimes takes me to the market town nearby where he sells our home products like vegetables, fruits, eggs… He then buys me an ice cream and lets me take a ride on the electric train in the town square. I love those trips. On starry nights, we children lie on the grass, looking at the sky and daring each other to find the Milky Way. We dream of faraway places. A. Read the passage and decide True (T) or False (F) (0,5pts) ………...1/ The boys helps his parent to collect water from the village well. ………...2/ The villagers rarely gather at the community hall at the weekend. B. Answer the following questions.( 0.75pt) 1/ How does the writer go to school? 2/ Does he like riding on the electric train in the town square? 3/ What do the children do on starry nights? III/ Writing ( 2.5 pts) Part I: * Read the situations and complete the sentences ( 1.5 pts) 1/ The black skirt is cheaper than the white one. ( expensive) -> The white skirt 2/ A horse can run 80km/ hr while a camel can only run 12km/ hr. ( slowly) -> A camel can run 3/ We are both bad at swimming but I’m better than my sister. ( badly) -> My sister swims 4/ The Eagle team performed more successfully than the Lion team. ( successfully) -> The lion team performed * Complete the following sentences with your own ideas 1/ Do you fancy ? 2/ My cousin detests
Các bạn ơi, mk đang thắc mắc bài này, các bạn có thể giúp mk đc k ạ??? Cảm ơn các bạn trc ạ😊😊😊
4 % cua 100 000 la giup tui voi
Khóa nội có 6 bác sĩ nữ, 4 bác sĩ nam. Khóa ngoại có 8 bác sĩ nam. Lập tổ công tác gồm 3 người. Xác suất trong tổ công tác lập ra có nằm, có nữ, có ngoại khóa, có nội khóa Mn giúp mình vs ạ
Giải giúp mình với mai mình phải nộp cô rồi
Hãy vẽ một mạch điện gồm một nguồn hai pin mắc nối tiếp, hai bóng đèn, một công tắc. Ta có thể biểu thị đc chiều của dòng điện theo trường hợp nào? Mng ơi, mình cần gấp, giúp mik nha
Giải giúp giùm bài 2 với ạ Cảm ơn trước Em cần gấp
Cho dãy x > 0 xác định như sau: f ( x ) = √ x + 1 − 1 x .Tìm ( 0 ; + ∞ )
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