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khongloithoat550
2 năm trước
a) Tìm các cặp tam giác bằng nhau trên hình. Giải thích vì sao? b)Vẽ BH AD, CK AC, chứng minh KC = HB. Chứng minh KC = HB và ΔABH = ΔACK. b)Vẽ BH AD, CK AC, chứng minh KC = HB. Chứng minh KC = HB và ΔABH = ΔACK. c) Gọi . C/m AI là tia phân giác của góc KAH.
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