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如图:把△ABC沿AB边平移到△A′B′C′的位置,它们的重叠部分(即图中阴影部...
如图:把△ABC沿AB边平移到△A′B′C′的位置,它们的重叠部分(即图中阴影部分)的面积是△ABC面积的一半,若AB=
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,则此三角形移动的距离AA′是( )
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A.
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-1
B.
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C.1
D.
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考点分析:
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A.
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B.
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C.
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D.
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将一副三角板按如图叠放,△ABC是等腰直角三角形,△BCD是有一个角为30°的直角三角形,则△AOB与△DCO的面积之比等于( )
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D.
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如图,已知AB∥CD,AD与BC相交于点P,AB=4,CD=7,AD=10,则AP=( )
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A.
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B.
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D.
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已知:如图,在△ABC中,∠ADE=∠C,则下列等式成立的是( )
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=
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B.
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=
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C.
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=
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D.
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如图,在△ABC中,DE∥BC,若
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A.9
B.10
C.11
D.12
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