Mathematics, 31.08.2021 16:50 trapvannah

Cho tam giác ABC vuông tại A có đường cao AD, AB = a và AC = a√(2). a) Giải tam giác ABC (độ dài cạnh tính theo a và số đo góc làm tròn đến phút).
b) Gọi M là trung điểm BC, N là trung điểm AC và E là giao điểm của AM và BN. Chứng minh AM⊥BN tại E.
c) Chứng minh góc BND = góc BCE

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Cho tam giác ABC vuông tại A có đường cao AD, AB = a và AC = a√(2). a) Giải tam giác ABC (độ dài c...

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