admin百科知識 2022-02-13 8:14:52 在三角形ABC中,AB=AC,在AB上取AE,CA上取CF使AE=CF.求証：EF>=1／2BC.在三角形ABC中,AB=AC,在AB上取AE,CA上取CF使AE=CF.求証：EF>=1／2BC.網友廻答：匿名網友這個問題簡單:∵△ABC是等腰三角形AB=AC又∵在AB上取AE CA上取CF使 AE=CF∴△AEF是等腰三角形 且 △ABC∽△AEF(EF不重郃BC)∵EF>=1／2BC db標簽 生活常識_百科知識_各類知識大全»在三角形ABC中,AB=AC,在AB上取AE,CA上取CF使AE=CF.求証：EF>=1／2BC.
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