cho tam giác ABC lấy b làm tâm (b,ac)lấy c làm tâm (có,ab) hai đường tròn cắt nhau tại E và f thuộc 2 nửa mặt phẳng bờ bc chứng minh các tam giác ABC=ECB=FCB chứng minh ab//cf ac//bf chứng minh tam giác abe=eca chứng minh ae//bc Em cần lời giải gấp giải đúng cách lớp 7 ạ Em cảm ơn các anh chị rất nhiều

Các câu hỏi liên quan

X. Write a passage in 80- 100 words about your watching TV habit .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. .............................................................................................................................................................................................................................................................................. ..............................................................................................................................................................................................................................................................................