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P是⊙O内一点,⊙O的半径为15,P点到圆心的距离为9,通过P点、长度是整数的弦...
P是⊙O内一点,⊙O的半径为15,P点到圆心的距离为9,通过P点、长度是整数的弦的条数是( )
A.5
B.7
C.10
D.12
考点分析:
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