Cho tam giac ABC vuông tại A có AB = 6cm, AC = 8cm. Kẻ đường cao AH sao cho AH vuông góc với BC (H thuộc BC) a. Tính độ dài BC b. Tia phân giác góc HAC cắt cạnh BC tại D. Qua D kẻ DK vuông góc AC (K thuộc AC). Chứng minh tam giác AHD = AKD c. Chứng minh tam giác BAD cân d. Tia phân giác góc BAH cắt canh BC tại E. Chứng minh: AB + AC = BC + DE

làm giúp mik cả bài vs các bạn

Jim Green is a student at May Secondary School. He (1)___________ classes from Monday to Friday. He has many (2)_______________ to do after class in the afternoon. On Monday and Wednesday, he helps his (3)___________ with their English. On Tuesday and Thursday, he takes part in the Informatics Club. On Friday, he goes (4)__________ on the river. He goes to the park or museum (5)_________ his parents and his sister (6)_______________ Saturday. On Sunday, he has a good rest (7)__________ home and (8)___________ his homework. Now it is 8:30 in the morning. Jim (9)________ in the classroom and having a maths class. He is listening to the teacher carefully. His friends David and Tony are looking at the blackboard. Lucy and Lily are thinking. Mary is writing something in her notebook. All of them (10)_________ working hard. 6. A. at B. in C. on D. to 7. A. in B. at C. on D. of 8. A. makes B. works C. does D. thinks 9. A. are sitting B. sitting C. sit D. is sitting 10. A. is B. are C. x D. be

1)|x+1/7|-2/3=-0 2)|x+1/3|-4= -1

một cuộc xổ số có 200 vé trong đó có 25 vé trúng giải. một người mua 2 vé . tính xác suất để người này trúng ít nhất 1 giải

Chotam giác ABC có AB=6cm,AC=12cm,BC=9cm.gọi I là giao điểm của các đường phân giác , G là trọng tâm tam giác.chứng minh:a.IG//BC b.tính IG

Use the given words to write the complete sentences: 1. Game show/ this month/test/ your knowledge/ world heritage. 2. Many people/ work/ hard/ today/ produce/ good/ program/television. 3. My brother/I/ dream/ become/pilot. 4.Many young people/ prefer/ watching TV/ reading books. 5. There/be/many/ exciting/program/ VTV3 6. We/often/ read/ book/watch/ favourite/program/free/time

Nguyên nhân, kết quả chiến tranh thế giới thứ hai 1939-1945

Jim Green is a student at May Secondary School. He (1)___________ classes from Monday to Friday. He has many (2)_______________ to do after class in the afternoon. On Monday and Wednesday, he helps his (3)___________ with their English. On Tuesday and Thursday, he takes part in the Informatics Club. On Friday, he goes (4)__________ on the river. He goes to the park or museum (5)_________ his parents and his sister (6)_______________ Saturday. On Sunday, he has a good rest (7)__________ home and (8)___________ his homework. Now it is 8:30 in the morning. Jim (9)________ in the classroom and having a maths class. He is listening to the teacher carefully. His friends David and Tony are looking at the blackboard. Lucy and Lily are thinking. Mary is writing something in her notebook. All of them (10)_________ working hard. 1. A. to have B. has C. have D. having 2. A. school B. lesson C. housework D. things 3. A. books B. friends C. rulers D. notebooks 4. A. to the zoo B. camping C. sailing D. shopping 5. A. with B. to C. by D. of

somebody stole his watch yesterday =>his watch