摘要:∴ FG = CD. AG =AD .∵ CD = BA = 6. AD = BC = 8 , ∴ FG = 3.AG = 4 . ∴ F(4.3). (3)解法一:∵ △A′E′F′是由△AEF沿直线AC平移得到的 ,∴ E′A′= E A = 3.E′F′= E F = 4 .① 如图11-1

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