TtenAn TtenAn
  • 10-12-2022
  • Mathematics
contestada

hãy giải 13 cách cho hình bình hành abcd. Vẽ đường thẳng xy qua c. Vẽ PL vuông góc cy (L thuộc xy), AH vuông gốc xy (H thuộc xy) và BK vuông góc xy ( K thuộc xy). Chính minh rằng AH = DL+BK

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