Mathematics, 14.07.2021 04:10 maddylosin1032
Cho tam giác ABC cân tại A,đường cao AH (Hthuộc BC):
a, chứng minh tam giác AHB= tam giác AHC.
b, từ H kẻ đường thẳng song song với AC ,cắt AB tại D. chứng minh AD=DH.
c, gọi E là trung điểm AC, CD cắt AH tại G. chứng minh B, G,E thẳng hàng.
Answers: 1
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Cho tam giác ABC cân tại A,đường cao AH (Hthuộc BC):
a, chứng minh tam giác AHB= tam giác AHC.
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