Cho hình thang ABCD (AB // CD), M là trung điểm của CD. Gọi I là giao điểm của AM và BD, K là giao điểm của BM và AC. a) Chứng minh IK // AB. b) Đường thẳng IK cắt AD, BC lần lượt ở E và F. Chứng minh EI = IK = KF.

Mn bỏ ngoặc rồi nhóm các phân số thích hợp lại với nhau

1.She would be killed if that she did not betray the patriots in the area. 2.The city of Lufkin, Texas, has had much than ten million employees working for it without pay. 3.These employers have not taken vacations, asked for sick leave, or complined about having to work long hours. 4. The worms eat the waste and turn it into clean fertilizer whom the city then sells to farmers. Tìm lỗi sai rồi sửa luôn hộ mình nhé

giúp mình vs ở dưới mẫu số lần lượt là 91 93 95 97 nha mn

Choose the suitable prepositions in brackets 1. Ba and Tam usually go fishing........................the weekends. (on, in, from, at) 2. The students will visit the capital.........................the summer. (on, in, at, of) 3. They heard a very strange noise............................midnight. (on, in, at, out) 4. Our little brother took a long nap from 1p.m.........................4p.m. (till, up, between, at) 5. The competitions will take place..........................8a.m and 12a.m. (from, between, up to, to) 6. She talked........................an hour to persuade her parents. (in, for, at, up to) 7. They have learned English..............................many years. (since, for, in, from) 8. The boys often go skiing..........................the winter. (in, at, on, for) 9. I’ve studied French................................3 months. (for, since, in) 10. I arrived.......................the bus stop at 4 in the afternoon. (in, at, on, to)

viết đoạn văn 8-15 dòng về nghị luận xã hội

gió mùa tây nam đã làm cho thời tiết ở duyên hải chung bộ có đặc điểm A nóng ẩm mưa nhiều B se lạnh khô hanh C nóng khô với hiệu ứng Phơn D mưa phùn ẩm ướt

Bài 1 |x-1|=2 |x+$\frac{1}{2}$ |=$\frac{3}{4}$ |2x+1-1=3 Bài 2 C=-(251.3+281)+3.25(1-281)

Viết số hữu tỉ a/b=c/d=>a=bc/a,b=ad/c,c=ad/b,d=bc/a dưới dạng một lũy thừa .Nêu tất cả các cách viết

Choose the suitable prepositions in brackets 1. Ba and Tam usually go fishing........................the weekends. (on, in, from, at) 2. The students will visit the capital.........................the summer. (on, in, at, of) 3. They heard a very strange noise............................midnight. (on, in, at, out) 4. Our little brother took a long nap from 1p.m.........................4p.m. (till, up, between, at) 5. The competitions will take place..........................8a.m and 12a.m. (from, between, up to, to) 6. She talked........................an hour to persuade her parents. (in, for, at, up to) 7. They have learned English..............................many years. (since, for, in, from) 8. The boys often go skiing..........................the winter. (in, at, on, for) 9. I’ve studied French................................3 months. (for, since, in) 10. I arrived.......................the bus stop at 4 in the afternoon. (in, at, on, to)