Mathematics, 03.10.2021 23:40 grumpygreengori

Cho tam giác ABC, các đường cao AK và BD cắt nhau tại G. Vẽ đường trung trực HE, HF của AC và BC. Chứng minh rằng : BG = 2HE và AG = 2HF.

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Cho tam giác ABC, các đường cao AK và BD cắt nhau tại G. Vẽ đường trung trực HE, HF của AC và BC....

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