user-avatar
khanhhuyen749
2 năm trước
Cho tam giác nhọn ABC ( AB < AC ) có các đường cao AD , BE cắt nhau tại H a) chứng minh ΔHAE đồng dạng với ΔHBD và HA.HD=HB.HE b) kẻ EK vuông góc với BC tại K . Chứng minh KE ² = KB . KC c) kẻ DI vuông góc với AC tại I . Chứng minh IK song song với AB
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

chỉ rõ hộ em câu trả lời nằm ở đâu trong đoạn vs ạ The first English settlers in America soon discovered that they had to learn to make the best of the local foods. They had brought wheat and rye seeds with them, but these, were difficult to grow in fields still full of tree stumps after the colonists’ amateurish clearing operations. Corn, on the other hand, was easy. From the North American Indians they learned not only how to grow it but how to cook it in a dozen simple and enjoyable ways - as porridge, flatbread, and as a kind of frumenty. They were pleased, too, to recognize their friend, the turkey (the Indians’ furkee). From the Indians the settlers discovered not only what was edible but how to cook it. One example is the seacoast clambake, a way of cooking clams and corn. Another cooking technique discovered was the barbecue, which seems to have filtered north from the Caribbean where the Carib Indians salted and smoke-dried meat over a fire of animal hides, a technique they called boucan. 28. We can see from the passage that the first English settlers_______. A. enjoyed the taste of indigenous foods B. had come to America well prepared for farming C. were amateurs when it came to planting crops D. were dependent on the North American Indians for everything 29. What does the word “it” in the second paragraph refer to? A. wheat B. rye C. corn D. porridge 30. The underlined word “edible” in paragraph 3 probably means_______. A. can be cooked B. can be eaten C. expensive D. very bad 31. It can be inferred from the passage that_______. A. the first settlers were expert at cutting down trees B. the first settlers preferred English cooking C. the first settlers and the Indians both valued the turkey D. the Indians and the first settlers enjoyed cooking food together 32. The best title for the passage would be_______. A. The foods and cooking techniques of the North American Indians B. Carib Indian foods and cooking techniques C. Difficulties encountered by the English settlers in growing crops in North America D. The new foods and cooking techniques used by the English settlers

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team