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如图,⊙O的半径为5,弦AB的长为8,点M在线段AB(包括端点A,B)上移动,则...
如图,⊙O的半径为5,弦AB的长为8,点M在线段AB(包括端点A,B)上移动,则OM的取值范围是( )
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A.3≤OM≤5
B.3≤OM<5
C.4≤OM≤5
D.4≤OM<5
考点分析:
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如图,⊙O中,弦AB的长为6cm,圆心O到AB的距离为4cm,则⊙O的半径长为( )
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C.105°或15°
D.210°或30°
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如图,AB是⊙O的弦,OC⊥AB,垂足为C,若⊙O的半径为5,OC=3,则弦AB的长为( )
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如图,AB是⊙O的直径,弦CD⊥AB,垂足为E,如果AB=20,CD=16,那么线段OE的长为( )
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