CE為角平分線。AE = Y*X/(8+X)且AE=EC。三角形ADC與三角形CDE相似
Y/X = 8/EC=8/AE, 即得 Y^2 = 8*(8+X)。
補充這個作角平分線推導第二方程的細節。
本帖於 2022-04-13 23:17:36 時間, 由普通用戶 wxcfan123 編輯
CE為角平分線。AE = Y*X/(8+X)且AE=EC。三角形ADC與三角形CDE相似
Y/X = 8/EC=8/AE, 即得 Y^2 = 8*(8+X)。
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