問題詳情
1.圓O的半徑為r公分，圓心O到直線L的距離為 12 公分，直線L是圓O的割線，請問r可能為下列哪一個長度?
(A)4π公分
(B)3π公分
(C)2π公分
(D)π公分。
(A)4π公分
(B)3π公分
(C)2π公分
(D)π公分。
參考答案
答案：A
難度：非常困難0
書單：沒有書單，新增
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