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Vyvy123
2 năm trước
Cho hình vuông ABCD; lấy điểm E sao cho góc BAE = 15 độ; lấy điểm F trên CD sao cho góc DAF = 30 độ; từ B kẻ đoạn thẳng BH vuông góc với AE tại H; trên tia đối của HB lấy điểm P sao cho HB= HP. a) chứng minh tam giác ABP cân; B) chứng minh tam giác APD đều c) chứng minh rằng: E; P; F thẳng hàng
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