△ABC中,AC=BC,∠C=120°,D在BC上,△BDE为等边三角形,连接AE,F为AE中点,连结CF,DF

△ABC中,AC=BC,∠C=120°,D在BC上,△BDE为等边三角形,连接AE,F为AE中点,连结CF,DF(1)请直接写出CF,DF的关系,不必说明理由。(2)将图... △ABC中,AC=BC,∠C=120°,D在BC上,△BDE为等边三角形,连接AE,F为AE中点,连结CF,DF
(1)请直接写出CF,DF的关系,不必说明理由。
(2)将图1中的△DBE绕B顺时针旋转α(0<α<60),其他条件不变,如图2,(1)中的结论是否仍然成立?为什么?
(3)若将(1)中的△DBE绕点B旋转90°,其他条件不变,请完成图3,并直接给出结论,不必说明理由

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K死神VS火影K
2010-05-30
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(1)CF=DF
(2)因为所以,科学道理啊!
(3)..........百度地图

本数据来源于百度地图,最终结果以百度地图最新数据为准。

百度网友74f37ad
2012-02-26
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(1)CF⊥DF,DF= 根号3倍CF
(2)
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LeiLiang06
2010-06-01
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Zapatero asks Board convene CyL elections if economic uncertainty continues.
Duruelo de la Sierra (Soria), May 19 .- The vice president of the Junta de Castilla y Leon, Maria Jesus Ruiz has stated today that the Prime Minister of Spain Jose Luis Rodriguez Zapatero, must call an early general election if the continuing economic uncertainty.

That is something that Ruiz, who has attended the inauguration of a residence for elderly people in Duruelo de la Sierra (Soria)., sto credits,

"A long time ago it is perceived that the situation in which we and the lack of concretion and ideas by the current government, would require a major change of government," he indicated.

In this regard, he pointed out that the best solution is to propose an early election and "give voice again to citizens to decide" who they think is best able to move forward. " 1010772
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