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AB=BC AC=BC ∠B.=60° ∠ACB=60°
AB=BC AC=BC ∠B.=60° ∠ACB=60°
AB=BC AC=BC ∠B=60° ∠ACB=60°
ADBE ∠ABC=∠DEF ED⊥AC △ADE为等边三角形
AB=BC AC=BC ∠B=60° ∠ACB=60°
AB=BC AC=BC ∠B=60° ∠ACB=60°
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AB=BC AC=BC ∠B=60° ∠ACB=60°
AC⊥BD 四边形ABCD 面积为 四边形ABED是等腰梯形
AB=BC AC=BC ∠B=60° ∠ACB=60°
AB=BC AC=BC ∠B.=60°. ∠ACB=60°.
AB=BC AC=BC ∠B.=60° ∠ACB=60°
AB=BC AC=BC ∠B.=60° ∠ACB=60°
AB=BC AC=BC ∠B=60° ∠ACB=60°