hien180209 hien180209
  • 07-03-2024
  • Mathematics
contestada

Cho tam giác ABC vuông góc tại A , tia phân giác của góc B cắt AC tại D . Kẻ DE vuông góc với BC tại E , kẻ AH vuông góc với BC tại H a) Cm tam giác ABD = EBD b) Cm AE là phân giác của góc CAH và AE vuông góc với BD c) Gọi F là giao điểm của AH và BD . Cm EF//AC

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