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如图,在▱ABCD中,AB=6,AD=9,∠BAD的平分线交BC于点E,交DC的...
如图,在▱ABCD中,AB=6,AD=9,∠BAD的平分线交BC于点E,交DC的延长线于点F,BG⊥AE,垂足为G,BG=
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101719103034679/SYS201311031017191030346001_ST/0.png)
,则△CEF的周长为( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103101719103034679/SYS201311031017191030346001_ST/images1.png)
A.8
B.9.5
C.10
D.11.5
考点分析:
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如图,已知AD为△ABC的角平分线,DE∥AB交AC于E,如果
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=
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,那么
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=( )
A.
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B.
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C.
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D.
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如图,已知C是线段AB上的任意一点(端点除外),分别以AC、BC为斜边并且在AB的同一侧作等腰直角△ACD和△BCE,连接AE交CD于点M,连接BD交CE于点N,给出以下三个结论:①MN∥AB;②
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=
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+
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;③MN≤
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AB,其中正确结论的个数是( )
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A.0
B.1
C.2
D.3
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在平面直角坐标系中,正方形ABCD的位置如图所示,点A的坐标为(1,0),点D的坐标为(0,2).延长CB交x轴于点A
1,作正方形A
1B
1C
1C;延长C
1B
1交x轴于点A
2,作正方形A
2B
2C
2C
1…按这样的规律进行下去,第2010个正方形的面积为( )
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A.
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B.
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C.
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D.
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如图,△ABC中,DE∥BC,
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=
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,DE=2cm,则BC=( )
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A.6cm
B.4cm
C.8cm
D.7cm
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如图,在Rt△ABC中,∠ACB=90°,∠A=30°,CD⊥AB于点D.则△BCD与△ABC的周长之比为( )
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A.1:2
B.1:3
C.1:4
D.1:5
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