Mathematics
Mathematics, 16.06.2021 05:10, babygirlslay109

Cho tam giác ABC nhọn nội tiếp đường tròn (O). Hai đường cao BD và CE cắt nhau tại H a) chứng minh ADE = ABC
b) tia phân giác của BAC cắt đường tròn (O) tại K. Chứng minh AH//OD

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Cho tam giác ABC nhọn nội tiếp đường tròn (O). Hai đường cao BD và CE cắt nhau tại H a) chứng minh...

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