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sokara01659010420
2 năm trước
Giúp e vs ạ (vẽ hình luôn nha) Cho tam giác ABC vuông tại A. Tia phân giác góc B cắt AC tại D. Vẽ DH vuông góc BC ( H thuộc BC) a. Chứng minh tam giác ABD = tam giác HBD b. Đường thẳng AB cắt HD tại K. Chứng minh AK =HC c. Chứng minh tam giác BKC cân
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