✨ 最佳解答 ✨ Mer 1年以上以前 令AE = ED = x,BF = 2y,FC = y 2x = 3y,x : y = 3 : 2 △DEH~△BFH,DH : HB = DE : BF = 3 : 4 △ADG~△BFG,DG : GB = AD : BF = 6 : 4 = 3 : 2 HB = 105*(4/7) = 60,GB = 105*(2/5) = 42 GH = HB - GB = 18 留言