user-avatar
trinhami1306
2 năm trước
cho hình chữ nhật ABCD.AH vuông góc với BC.a,Chúng minh tam giác AHD đồng dạng với tam giác DCB . b, AB=8 AD=6 tính DH. c, gọi MN là trung điểm lần lượt HA và HB I là trung điểm CD . CMR : MNID là hình bình hành
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

because of resources is needed negative impact ever-growing population Overpopulation affects not only the standard of living, but also the environment. Every person on the planet takes up space, but space (1) for farmland, and forests. People produce wastes and pollution that flow into water systems, and animal habitats, polluting water, and killing wildlife. Many people cannot bathe or brush their teeth (2) the polluted water in their land. Forests are being cut down as more wood and land is needed to support our (3) . The loss of these forests leads to extinction of plants and animals. These plants could contain cures for diseases that will never be found. Urban areas are expanding, and so polluting the air and water systems. These areas deplete the Earth's (4) , and billions of hectares of farming land have already been lost. These really have a (5) on people and on the health of our planet.

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