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yennnguyenn206
2 năm trước
Bài 2. Cho tam giác ABC vuông tại A, đường cao AH. Gọi D là điểm đối xứng với H qua AB, gọi E là điểm đối xứng với H qua AC. Gọi M là giao điểm của HD với AB, N là giao điểm của HE với AC. a) Tứ giác AMHN là hình gì? Vì sao? b) Chứng minh D đối với E qua A c) Tứ giác BCED là hình gì? Vì sao? d) Chứng minh BC = BD + CE vẽ hình hộ mk bài này vs ah , mk đg cần gấp hình ah nếu bn nào giải đc thì cg tốt ah mk sẽ lay mấy nick kia của mk vote cho ah
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