hình thang cân ABCD có đáy  CD =10cm ,đáy nhỏ bằng đường cao, đường chéo vuông góc với cạnh bên
hãy dựng hình với độ chính xác tuyệt đối

bị xóa vì bị trùng bởi Đức Vỹ 27-10-13 01:45 PM

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

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