如图,△ABC内接于⊙O,AD⊥BC于点D,BE⊥AC于点E,AD、BE相交于点H.若BC = 6,AH = 4,则⊙O的半径为 ( )
A.5 B.2 C. D.5.5
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如图,△ABC内接于⊙O,AD⊥BC于点D,BE⊥AC于点E,AD、BE相交于点H.若BC = 6,AH = 4,则⊙O的半径为 ( )
A.5 B.2 C. D.5.5