hình thang cân  ABCD có cạnh đáy CD=10cm , đáy nhỏ bằng đường cao đường chéo vuông
góc với canh bên .hãy nêu cáh  dựng hình 1 lần xong luôn.hãy vẽ với tỉ lệ chính xác là tuyệt đôi 
 
Hãy vẽ ra trước rồi hãy nói .dừng chém gió.xin chân trọng cảm ơn

bị xóa vì bị trùng bởi Đức Vỹ 27-10-13 01:50 PM

Câu hỏi này có nội dung hoàn toàn trùng với câu hỏi đã có.

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