✨ 最佳解答 ✨ Mer 27天以前 延長GD使DH = GD = 4 則BHCG為平行四邊形(因為BD = DC且GD = DH) BH = GC = 6,△BHG三邊長6,8,10為直角三角形 △BHG = 6*8/2 = 24 △BDG = (1/2)△BHG = 12(因為GD = DH且同高) △ABC = 6△BDG = 72 留言